How is physical and chemical change the same?
Answers
Answer
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions
Related Questions
write one report in 300 words explaining any of the following topics listed below. Please no plagiarism. Please helppp
Answers
Viruses and bacteria are two types of microorganisms that can cause disease in humans and other animals. While they share some similarities, they also have many differences in terms of their structure, replication, and the ways in which they cause disease.
Bacteria are single-celled organisms that come in many different shapes and sizes. They can be either beneficial or harmful to humans, depending on the species and the circumstances. Some bacteria live in the human gut and help to digest food, while others can cause infections such as strep throat, pneumonia, and meningitis. Bacteria have a cell wall that provides structural support and protection, and they reproduce through a process called binary fission, in which one cell divides into two identical cells.
Viruses, on the other hand, are not technically alive, as they cannot replicate or carry out metabolic processes on their own. Instead, they rely on host cells to reproduce and spread. Viruses are made up of a core of genetic material (either DNA or RNA) surrounded by a protein coat called a capsid. Some viruses also have an outer envelope made up of lipids. Viruses attach themselves to host cells and inject their genetic material into the cell, which then takes over the host's machinery to produce more virus particles.
While bacteria can cause disease by invading and damaging host tissues, viruses typically cause disease by hijacking host cells and using them to produce more virus particles. Some common viral infections in humans include the common cold, flu, and HIV.
Both bacteria and viruses can be treated with antibiotics or antiviral medications, but these treatments can be less effective or even ineffective if the microorganism has developed resistance to the medication. Prevention measures such as vaccinations and good hygiene practices are often the best way to control the spread of these microorganisms.
In summary, bacteria and viruses are two distinct types of microorganisms that can cause disease in humans and animals. Bacteria are single-celled organisms with a cell wall that can reproduce through binary fission, while viruses are not technically alive and rely on host cells to replicate. Understanding the differences between these microorganisms is essential for preventing and treating infectious diseases.
The activation energy of a reaction can be decreased by
A.
increasing the concentration of the reactants.
B.
increasing the temperature.
C.
increasing the pressure of gaseous reactants.
D.
adding a catalyst.
Answers
Hi,
The answer is D
Hope this helps
dna is cut at __ sequences by restriction enzymes.
Answers
Answer:
the
Explanation:
DNA which is a genetic material is cut at restriction site or Target sequence
What is restriction enzymes?Restriction enzymes refers to protein that is produce by bacteria and recognizes a DNA by cleaving to it and cuts the DNA only at that specific site, which is known as restriction site or target sequence.
DNA is the genetic constituent of a living organism.
Therefore, DNA is cut at restriction site or Target sequence
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Design your own scenario related to Bacteria or Viruses. Identify the independent and dependent variables.
Answers
Answer:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration for example, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
Explanation:
An independent variable is a variable that represents a quantity that the scientist modifies in an experiment. A dependent variable represents a quantity whose value depends on how the independent variable is modified. This is the variable being studied and measured.
So, an example of this applied to bacteria or viruses could be:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
To complete the experiment, an antibiotic whose effect is already known can be used as a positive control. That is, it is already known to kill the bacteria. And as a negative control you can simply use water, which has no effect and is known not to kill the bacteria. In this way, we validate the results and make sure that there is not something else that is affecting the bacteria and that only the antibiotic being studied has an influence.
How are Mitosis and Binary Fission both similar and different
Answers
Both mitosis and binary fission are cell replication mechanisms that give as a result two genetically identical cells.
The main difference between them is that mitosis occurs in eukaryotic cells and its main purpose is the growth of the organism or for regeneration of a tissue, while binary fission happens in prokaryotes organisms and it's the way unicellular organisms, such as bacteria, reproduce.
A botanist has discovered a new plant species and is trying to classify the plant. Its seed has one cotyledon, it has six flower
parts, its leaves have parallel veins, its stem is herbaceous, and the vascular bundles in its stem are scattered throughout the
stem. Which best classifies this plant?
O gymnosperm and dicot
O gymnosperm and monocot
O angiosperm and monocot
O angiosperm and dicot
Answers
commonly referred to as monocots, (Lilianae sensu Chase & Reveal) are flowering plants (angiosperms), the seeds of which typically contain only one embryonic leaf, or cotyledon. They constitute one of the major groups into which the flowering plants have traditionally been divided, the rest of the flowering plants having two cotyledons and therefore classified as dicotyledons, or dicots. However, molecular phylogenetic research has shown that while the monocots form a monophyletic group or clade (comprising all the descendants of a common ancestor), the dicotyledons do not. Monocotyledons have almost always been recognized as a group, but with various taxonomic ranks and under several different names. The APG III system of 2009 recognises a clade called "monocots" but does not assign it to a taxonomic rank.
The monocotyledons include about 60,000 species. The largest family in this group (and in the flowering plants as a whole) by number of species are the orchids (family Orchidaceae), with more than 20,000 species. About half as many species belong to the true grasses (Poaceae), which are economically the most important family of monocotyledons. In agriculture the majority of the biomass produced comes from monocotyledons. These include not only major grains (rice, wheat, maize, etc.), but also forage grasses, sugar cane, and the bamboos. Economically important monocotyledon crops include various palms (Arecaceae), bananas and plantains (Musaceae), gingers and their relatives, turmeric and cardamom (Zingiberaceae), asparagus (Asparagaceae), pineapple (Bromeliaceae), water chestnut (Cyperaceae), and leeks, onion and garlic (Amaryllidaceae). Many houseplants are monocotyledon epiphytes. Additionally most of the horticultural bulbs, plants cultivated for their blooms, such as lilies, daffodils, irises, amaryllis, cannas, bluebells and tulips, are monocotyledons
Hope this helps
Answer:
it's Angiosperm and Monocot. or C. on edge
Explanation:
The muscles that are included in the shoulder girdle group include all of the following except?
a. Pectoralis major
b. Trapezius
c. Serratus Anterior
d. Rhomboid major and minor
Answers
The correct answer is a. Pectoralis major. The muscles that make up the shoulder girdle group are responsible for stabilizing and moving the shoulder blade (scapula).
The Trapezius muscle is located on the upper back and neck and helps to move the shoulder blade. The Serratus Anterior muscle is located on the side of the chest and helps to rotate the shoulder blade upward. The Rhomboid major and minor muscles are located on the upper back and help to retract the shoulder blade. The Pectoralis major muscle is not part of the shoulder girdle group, but rather is located on the front of the chest and is responsible for movements such as flexion and adduction of the arm.
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About how much energy’s lost when an organism consumes another organism from a different trophic level?
Answers
Answer:
10 percent of energy is transferred to the next level of organisms so that would lead me to believe that 90 percent of the energy is lost.
List these in order from biggest to smallest
DNA
Cell
Nucleus
Chromosome
Gene
Answers
Answer:
Cell
Nucleus
Chromosome
Gene
DNA
Which membranous organelle stores calcium and is a primary site of lipid metabolism?
Answers
According to the research, the correct option is endoplasmic reticulum. It is a membranous organelle stores calcium and is a primary site of lipid metabolism.
What is endoplasmic reticulum?It is an organelle that is distributed throughout the cytoplasm of eukaryotic cells, acts as a calcium store in the cell and synthesizes most of the fats that make up the cell membranes, such as cholesterol and glycerophospholipids.
It is responsible for collecting and storing the calcium that is floating in the cytosol, this collection of this element is carried out through the action of calcium pumps that are found in the reticulum membrane.
Therefore, we can conclude that according to the research, the correct option is endoplasmic reticulum. It is a membranous organelle stores calcium and is a primary site of lipid metabolism.
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Multiple choice biology
Answers
Answer:
a
Explanation:
Benzo plants have flowers that are either red,orange,or yellow. The color of the flowers of these plants are determined by genes that have no dominance. Each offspring inherits one flower-color gene from each parent.RR=red flowers.RY=orange flowers.YY=yellow flowers.What are the odds that a plant will have red flowers if both of its parents have orange flowers?
Answers
If both parents have orange flowers, their genotypes would be RY. When determining the odds of a plant having red flowers, we need to consider the possible combinations of genes that the offspring can inherit from its parents. The odds that a plant will have red flowers if both of its parents have orange flowers is 1 out of 2, or 1/2.
In this case, there are two possible combinations:
Offspring inherits the R gene from one parent and the Y gene from the other parent (RY)
Offspring inherits the Y gene from both parents (YY)
Since the R gene produces red flowers, only the first combination (RY) would result in red flowers. The second combination (YY) would result in yellow flowers.
Therefore, the odds that a plant will have red flowers if both of its parents have orange flowers is 1 out of 2, or 1/2.
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Which adaptation would be most useful to an insect that lives in the grass?
long legs
green coloration
waterproof shell
strong wings
Answers
Answer:
Green Coloration
Explanation:
The adaptation that would be most useful to an insect that lives in the grass is green coloration. This would be a useful adaptation for them because now they could camouflage easily because the grass is green, and if they are also green and hiding in grass, nobody can spot them easily, which is a perfect way for them to hide from predators that may want to eat them.Organisms use camouflage to mask their location, identity, and movement. This allows prey to avoid predators, and for predators to sneak up on prey. ... The physical characteristics of the organism are important. Animals with fur rely on different camouflage tactics than those with feathers or scales, for instance.
Answer:
green coloration
Explanation:
i took the quizz<33
cirrhosis and korsakoff's syndrome are two of the consequences of chronic __________ consumption.
Answers
Cirrhosis and Korsakoff's syndrome are two of the consequences of chronic alcohol consumption.
Cirrhosis is a condition characterized by irreversible liver damage, where healthy liver tissue is replaced by scar tissue, leading to impaired liver function. Prolonged alcohol abuse puts significant strain on the liver, causing inflammation and ultimately leading to cirrhosis.
Korsakoff's syndrome, on the other hand, is a neurological disorder caused by a deficiency in thiamine (vitamin B1) often associated with alcoholism. It is characterized by severe memory loss, disorientation, and cognitive impairment.
Alcohol interferes with thiamine absorption and impairs its utilization in the body, leading to this debilitating syndrome. Both cirrhosis and Korsakoff's syndrome serve as alarming reminders of the detrimental effects of chronic alcohol consumption on both the liver and the brain.
It is crucial to raise awareness about the risks associated with excessive alcohol intake and promote responsible drinking habits to prevent these serious consequences.
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Vitamins are a source of "quick“ energy
Answers
Answer:
yes yes they are
Explanation:
If 32/200 pea plants die, what will be the new frequency for the tall allele?
Answers
The new frequency of the tall allele is 0.616.
To determine the new frequency for the tall allele?
Assuming that the tall allele is dominant and the short allele is recessive, we can use the Hardy-Weinberg equation to determine the new frequency of the tall allele after the 32 pea plants die:
p^2 + 2pq + q^2 = 1
Where
p is the frequency of the dominant (tall) allele q is the frequency of the recessive (short) alleleLet's assume that initially, the population was in Hardy-Weinberg equilibrium, which means that p^2 represents the frequency of homozygous dominant individuals (TT), 2pq represents the frequency of heterozygous individuals (Tt), and q^2 represents the frequency of homozygous recessive individuals (tt).
If 32 out of 200 pea plants die, that means 168 survive. Therefore, the new frequency of the recessive allele (q) is
q = sqrt(32/168) = 0.384
To find the frequency of the dominant allele (p), we can use the equation:
p = 1 - q = 1 - 0.384 = 0.616
Therefore, the new frequency of the tall allele is 0.616.
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If you have ever dissolved salt in hot water, you have witnessed the effectiveness water has a solvent. Which of the following best explains how salt dissolves?
A. Water's ability to reheat keeps the salt moving.
B. Cohesive properties of water attract salt
C. Hot water melts salt
D. Polarity of water pull apart apart the salt molecule.
Answers
Answer: C. Hot water melts salt.
Explanation:
Because if I put hot water in a cup and poured salt into that same cup the salt is going to dissolve into the water, Because the water melts the salt.
A stem cell divides by mitosis to yield either two daughter cells that are stem cells like itself, or one that is a stem cell and one that is a partially specialized _____ cell.
Answers
Cladograms are scientific hypotheses that can be overturned by new data. True False Angiosperm plants did not appear until after the extinction of the dinosaurs. True False The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". True False In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. True False The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". True False An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. True False
Answers
An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. This statement is false. An ichnofossil is a trace fossil, which is any indirect evidence of past life, such as tracks, burrows, and feces. It is not part of the hard skeleton left behind by a vertebrate.
Cladograms are scientific hypotheses that can be overturned by new data. This statement is true. Cladograms are diagrams that show the evolutionary relationship between organisms based on various traits. New data can cause changes to be made to cladograms which can result in a change to the interpretation of the evolutionary history of organisms.
Angiosperm plants did not appear until after the extinction of the dinosaurs. This statement is false. Angiosperms, also known as flowering plants, appeared in the fossil record at least 140 million years ago. Although the dinosaurs went extinct around 66 million years ago, angiosperms were already widespread and diversifying by that time.
The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". This statement is true. Analogous characters are traits that have evolved independently in different groups of organisms due to similar environmental pressures and not due to a shared ancestor.
In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. This statement is true. Non-genetic changes that occur during an organism's life span are not heritable and cannot be passed on to the next generation. Only genetic changes that occur in the germ cells, such as mutations, can be passed on to the offspring.
The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". This statement is false. A monophyletic group is a group of organisms that has a single ancestor and contains all of the descendants of this unique ancestor. This group is also called a clade.
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Human impact to estuaries
List five factors that can change the flow
water through an estuary.
(All About Estuaries in NC textbook)
Answers
Certain human do impact estuaries
What affects the flow water through an estuary?The flow of water through an estuary can be affected by several factors, including:
Tidal cycles: Estuaries are affected by tidal cycles, which can cause significant fluctuations in water levels and flow rates. The ebb and flow of the tides can cause strong currents and create turbulence in the water.
River discharge: The amount of water flowing into the estuary from upstream rivers can have a significant impact on the flow of water in the estuary. During periods of heavy rainfall or snowmelt, river discharge can increase, causing a surge of freshwater to flow into the estuary and push back the seawater. Conversely, during periods of low rainfall, river discharge may decrease, leading to a lower flow of freshwater into the estuary.
Wind: Strong winds can cause surface currents and waves, which can affect the flow of water in the estuary. Wind can also influence the distribution of sediment and nutrients in the water.
Salinity gradients: Estuaries are characterized by gradients in salinity, with seawater at the mouth of the estuary and freshwater from upstream rivers at the head of the estuary. These gradients can influence the flow of water, as freshwater will tend to flow downstream toward the seawater.
Topography: The topography of the estuary, including its shape, depth, and width, can influence the flow of water. Narrow channels and deep channels can create stronger currents, while shallow areas can cause turbulence and slow the flow of water.
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When we begin to get dehydrated, we usually get thirsty, which causes us to drink fluids. Is thirst part of a negative or a positive feedback system
Answers
Negative Feedback
Why is evolution so important for understanding biology?
Answers
Answer:
Explanation:
Evolution is essential for understanding biology because it provides a unifying framework for explaining the diversity of life on Earth. Evolution is the process by which species change over time through natural selection and genetic variation, leading to the emergence of new species and the extinction of others.
Here are some key reasons why evolution is crucial for understanding biology:
Explaining the diversity of life: Evolution explains why there are so many different species of plants, animals, and microorganisms on Earth, and how they are related to each other through common ancestry.
Understanding adaptations: Evolution explains how organisms adapt to their environment through natural selection. This process drives the development of traits that enable organisms to survive and reproduce in their particular ecological niche.
Predicting the emergence of new diseases: Evolution helps us understand how pathogens, such as viruses and bacteria, can evolve and become more virulent or resistant to antibiotics, which is crucial for predicting and responding to emerging diseases.
Advancing medical research: Evolutionary principles are essential for understanding the genetics of diseases, and for developing new treatments and vaccines.
Informing conservation efforts: Understanding the evolutionary relationships between species is crucial for conserving biodiversity and protecting endangered species.
Overall, the theory of evolution provides a unifying framework for understanding the biological world and helps us make predictions and develop solutions to a wide range of biological problems.
(Please give brainlist)
Within an individual cell, where are the cytoplasm and the nucleus found? What characteristic of plant cells can be inferred from observations of the cytoplasm & nucleus?
Answers
Answer:
Explanation:
Plant Cells have a membrane bound nucleus and this is commonly found in eukaryotic cell. The nucleus allows envelopes the DNA (Deoxyribonucleic acid). They also contain a cell wall and central vacuole that holds water and pushes the nucleus towards the cell wall.
cells have a membrane bound nucleus, it helps in maintaining the activities of the cell and also contain the genetic material DNA
The cytoplasm of a plant cell is located within the cell membrane of the cell and it also envelopes other organelles such as the golgi bodies and endoplasmic reticulum. It helps regulate cell metabolic activity because of the organelles located within it and also help with movement inside of the membrane.
The cells in the human heart work to make this muscle beat over 100,000 times each day. The cells in your kidneys remove
waste products and extra water from the body. Which cell organelles would you expect to be present in large quantities in
each cell type?
O A. Nuclei in the heart cell and mitochondria in the kidney cell
O
B. Vacuoles in the heart cell and chloroplasts in the kidney cell
O C. Lysosomes in the heart cell and mitochondria in the kidney cell
D. Mitochondria in the heart cells and lysosomes in the kidney cell
Answers
Answer:
B
Explanation:
*20 POINTS*
Evolution occurs only when the conditions of Hardy-Weinberg equilibrium are not satisfied. What are the conditions for maintaining Hardy-Weinberg equilibrium in a population of beetles for evolution? Drag each sentence into the correct box.
Conditions for Hardy-Weinberg equilibrium Conditions for evolution to occur
Answers
When a population reaches Hardy-Weinberg equilibrium for a gene, it stops evolving and allele frequencies remain constant across generations. Hardy-Weinberg assumptions include no mutation, random mating, no gene flow, infinite population size, and no selection.
EXPECTATIONS FOR HARDY
There should be no mutations in the beetle population because new alleles would change the allele frequencies.Beetle mating should occur at random.Natural selection should not occur in the beetle population.The population of beetles must be large enough to prevent genetic drift.There should be no beetle migration into or out of the population.EVOLUTIONARY CONDITIONS-
Green beetles benefit from natural selection.Purple mutants can be found among the Beatles.Because preferred mates are red, these people reproduce.A forest fire killed a large number of brown beetles.There are still a significant number of yellow beetles.To know more about Hardy Weinberg’s equilibrium click here,
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What are the good fats for your brain?
O the glycemic fats
O the omega fats
O low cholesterol
O high cholesterol
Answers
Answer:
B
Explanation: The omega fats, I hope it helps
if an organism exhibits a head with sensory structures, which of the following characteristics would it likely also exhibit? question 3 options: a) it is segmented b) it is diploblastic c) it has a coelom d) it is bilaterally symmetrical
Answers
Option D is the correct. If an organism exhibits a head with sensory structures, it would most likely also exhibit the characteristic of being bilaterally symmetrical.
Bilaterally symmetrical is a term used to describe an organism or part of an organism that can be divided into two equal halves when sliced along the middle in one plane. This is achieved when there is only one plane of symmetry, and the organism's left side is the mirror image of its right side.
The organism's head, in this case, is a structure that is anterior to the rest of the organism's body. It is composed of sensory structures that are capable of detecting stimuli in the environment. Bilateral symmetry ensures that the organism is balanced and able to move in a straight line while locating and responding to stimuli in its environment.
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What would be the appearance of a cell that completes mitosis without completing cytokinesis?.
Answers
how did meselson and stahl distinguish between semi-conservative and conservative replication in their experiment? group of answer choices after two rounds of replication, only mixed dna helices were present in the gradient. after one round of replication, only mixed dna helices were present in the gradient. after one round of replication, only heavy dna helices were present in the gradient. after one round of replication, only light dna helices were present in the gradient.
Answers
Meselson and stahl distinguish between semi-conservative and conservative replication in their experiment c. after one round of replication, only heavy dna helices were present in the gradient.
In order to ascertain whether the process of DNA replication adhered to a semi-conservative or conservative model, Meselson and Stahl carried out an experiment in 1958. They labelled the DNA of Escherichia coli bacteria using the nitrogen isotopes (15N and 14N), and they then allowed the bacteria to multiply in a medium with 14N as the only nitrogen supply.
Growing E. coli over a number of generations in a medium containing heavy nitrogen allowed researchers to label all of the bacteria' DNA. After that, the marked E. coli were put in a medium containing light nitrogen and given time to complete one round of DNA replication. At this stage, Meselson and Stahl performed a density gradient centrifugation analysis on the DNA.
Complete Question:
How did meselson and stahl distinguish between semi-conservative and conservative replication in their experiment?
a. after two rounds of replication, only mixed dna helices were present in the gradient.
b. after one round of replication, only mixed dna helices were present in the gradient.
c. after one round of replication, only heavy dna helices were present in the gradient.
d. after one round of replication, only light dna helices were present in the gradient.
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most signals travel via the optic nerve from the retina to the a. temporal cortex. b. the superior colliculus. c. lateral geniculate nucleus. d. the visual homunculus.
Answers
The correct answer to the student question is option C: lateral geniculate nucleus. Most signals travel via the optic nerve from the retina to the lateral geniculate nucleus.
The retina is a thin layer of tissue that lines the back of the eye. It senses light and sends signals to the brain through the optic nerve. The optic nerve carries information from the retina to the brain. Most of the information is sent to he lateral geniculate nucleus of the thalamus. From there, it is distributed to other areas of the brain responsible for vision. In the lateral geniculate nucleus, information from the right eye is processed in the right hemisphere of the brain, and information from the left eye is processed in the left hemisphere. These signals are then transmitted to the visual cortex, where they are processed to create the perception of sight. The visual cortex is divided into many regions that specialize in processing different aspects of visual information. For example, the primary visual cortex is responsible for processing basic features like lines, edges, and movement. Other regions are involved in processing more complex visual information, such as object recognition and face recognition. The lateral geniculate nucleus is also involved in other functions, such as regulating the sleep-wake cycle and controlling eye movements.
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