Keystone species can have significant influences over several populations in a community through:____.
Answers
Keystone species can have significant influences on several populations in a community through the effect of high amounts of biomass and energy transfer between populations.
A keystone species is a type of organism that defines the whole ecosystem and hold together the complicated network of relationships between the organisms.
These species have immense importance in an ecosystem and serve as the key drivers of the entire system.
Without these species, the ecosystem would stop dramatically or cease to exist at all.
Undoubtedly, they have less function redundancy yet the maximum impact on the working and existence of the entire ecosystem.
They can be plants, animals, or microorganisms, for example, elephants, sea otters, and wolves.
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CAN SOMEONE HELP PLEASE
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What do the decomposers do to return atoms back to the biogeochemical cycles?
Answers
Answer:
they take organic matter and render it in inorganic form
Explanation:
Answer:
The demomposers break down the materials, so they can be recycled through the biogeochemical cycle.
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Do you have the answer
Answers
Answer:
A sun shine
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Butterflies usually are identified by the colors and patterns on their wings. Butterflies have four wings: The two wings near the butterfly’s head are “forewings” while the wings near the butterfly’s tail are “hindwings.” You can use the following dichotomous key to identify four common butterfly species in North America.
Answers
The shown butterfly in the diagram is - Papilio polyxenes.
Butterflies usually are identified by the colors and patterns on their wings. To identify an organism using a dichotomous key, compare the organism’s traits to the first pair of descriptive statements on the key.
Follow the directions after each matching statement until you get to the organism’s identity.The points on the hindwings identify the butterfly as
a swallowtail butterfly is either Papilio glaucus or Papilio polyxenes.1. Hindwings rounded ………………… Goto 3
2. Wings mainly yellow …………… Papilio glaucus
Wings mainly black ………….. Papilio polyxenes
3. Wings orange with black piping…Danaus plexippus
Wings yellow with black edges….. Colias philodice
The wings are mainly black, so the butterfly is Papilio Polyxenes (common black swallowtail)Thus, the shown butterfly in the diagram is - Papilio polyxenes.
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What are the 3 main stages of wound healing?
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The three main stages of wound healing are: Inflammatory phase , Proliferative phase, Maturation phase
Inflammatory phase: This stage begins immediately after the injury and lasts for several days. During this stage, the body's immune system responds to the injury by sending white blood cells to the site of the wound to fight infection and remove any debris. Proliferative phase: This stage begins a few days after the injury and can last for several weeks. During this stage, new tissue is generated to fill the wound. The wound begins to granulate, with new blood vessels forming to bring oxygen and nutrients to the site. Maturation phase: This stage begins several weeks after the injury and can last for up to two years. During this stage, the new tissue that was formed during the proliferative phase is remodeled and strengthened. Collagen fibers reorganize and align in the direction of stress, making the new tissue stronger. These stages of wound healing are interdependent and overlap to some degree, and a variety of factors, such as age, nutrition, and underlying health conditions, can affect the healing process.
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Lymphatic fluid is a plasma-like fluid that moves in and out of tissues, transporting numerous white blood cells but lacking red blood cells. True or false
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In conclusion, lymphatic fluid is indeed a plasma-like fluid that moves in and out of tissues, transporting numerous white blood cells but lacking red blood cells.
Lymphatic fluid is a plasma-like fluid that moves in and out of tissues, transporting numerous white blood cells but lacking red blood cells. This statement is true.
The lymphatic system plays a vital role in our immune system. Lymphatic fluid, also known as lymph, is a clear fluid that circulates through lymphatic vessels and lymph nodes. It is derived from interstitial fluid, which is the fluid that surrounds our cells.
Lymphatic fluid contains various types of white blood cells, including lymphocytes, macrophages, and dendritic cells. These cells are crucial for our immune response as they help identify and eliminate foreign substances, such as bacteria and viruses, from our body.
Unlike blood, lymphatic fluid does not contain red blood cells. Red blood cells are responsible for carrying oxygen to tissues and removing carbon dioxide. Since lymphatic fluid is primarily involved in immune function, it does not require red blood cells for its purpose.
In conclusion, lymphatic fluid is indeed a plasma-like fluid that moves in and out of tissues, transporting numerous white blood cells but lacking red blood cells.
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what is the pathway for airflow from the nasal cavity to the location of gas exchange within the lungs?
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The pathway for airflow from the nasal cavity to the location of gas exchange within the lungs involves several structures and regions within the respiratory system.
When we inhale, air enters the nasal cavity through the nostrils. The nasal cavity is lined with a specialized tissue called the respiratory epithelium, which contains tiny hair-like structures called cilia and mucus-producing cells. These structures help filter, warm, and humidify the incoming air.
From the nasal cavity, the air passes through the pharynx, which is the shared passage for both air and food. The epiglottis, a flap of cartilage, prevents food from entering the airway by covering the entrance to the trachea during swallowing.
Next, the air moves into the larynx, commonly known as the voice box. The larynx contains the vocal cords and plays a vital role in speech production. It also helps to direct the airflow into the correct pathway.
The air then enters the trachea, also known as the windpipe, which is a tube composed of C-shaped rings of cartilage that provide structural support. The trachea further divides into two main bronchi, known as the left and right primary bronchi, which enter the lungs.
Inside the lungs, the primary bronchi branch into smaller tubes called secondary bronchi. These further divide into even smaller bronchi known as tertiary bronchi. The bronchi progressively become smaller and more numerous, eventually forming a network of bronchioles.
The bronchioles continue to divide into even smaller passages called terminal bronchioles, which finally lead to the respiratory bronchioles. At this point, the respiratory bronchioles transition into the alveolar ducts, which eventually lead to the alveoli.
The alveoli are the site of gas exchange within the lungs. They are small, thin-walled air sacs surrounded by capillaries. Oxygen from the inhaled air diffuses across the thin alveolar walls into the capillaries, where it binds to red blood cells. At the same time, carbon dioxide, a waste product of cellular respiration, diffuses from the capillaries into the alveoli to be exhaled.
In summary, the pathway for airflow from the nasal cavity to the location of gas exchange within the lungs involves the nasal cavity, pharynx, larynx, trachea, primary bronchi, secondary bronchi, tertiary bronchi, bronchioles, terminal bronchioles, respiratory bronchioles, alveolar ducts, and finally, the alveoli where gas exchange takes place.
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"There are five different types of nucleotide bases found in living things. Which is an accurate comparison of the bases found in birds and the bases found in flowers?"
A Birds and flowers have different arrangements of the bases.
B Birds have fewer bases in their cells than flowers do.
C Birds and flowers have different types of bases.
D Birds and flowers have the same arrangement of the bases.
Answers
Birds and flowers differ genetically and are, therefore, different in the arrangements of their nucleotide bases. Option A.
DNA sequence of organismsAll living organisms have DNA as their molecule of hereditary. The DNA of all living organisms is similar in terms of components.
Every DNA contains:
nucleotide bases: adenine, guanine, cytosine, and thymine.deoxyribose sugarphosphate groupWhat makes each living organism unique is the arrangement of the nucleotide bases. The nucleotide bases form complementary pairs in the DNA double helix structure.
In other words, two organisms of different species may have the same composition in terms of their DNA, what makes them unique is the arrangement of the nucleotide bases in their DNAs.
Hence, birds and flowers have different arrangments of their DNA bases because they are different in terms of species.
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describe the relationship between genes, mrna, and proteins.
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Genes, mRNA (messenger RNA), and proteins are all key players in the process of gene expression and the central dogma of molecular biology. During transcription, a gene's DNA sequence is transcribed into mRNA, which carries the genetic code from the nucleus to the cytoplasm.
In translation, ribosomes read the mRNA sequence and match it with the corresponding amino acids carried by tRNA molecules. This results in the synthesis of a protein according to the genetic code. Proteins are the functional molecules that carry out various cellular processes and determine an organism's traits.
Therefore, genes provide the template for mRNA synthesis, which, in turn, serves as a blueprint for protein production, illustrating the interconnectedness and flow of genetic information in the process of gene expression.
Genes contain the instructions for building proteins. These instructions are transcribed into mRNA through the process of transcription. The mRNA then undergoes processing and travels to the cytoplasm, where it is translated by ribosomes into proteins. This relationship between genes, mRNA, and proteins is fundamental to the central dogma of molecular biology and the flow of genetic information within living organisms.
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what is population density?group of answer choicesthe number of individuals per unit areadistribution of organisms within a community in small, patchy aggregations, or clumpsdistribution of organisms within a community characterized by equal space between individualsdistribution of organisms within a community whereby the position of one organism is in no way influenced by the positions of other organisms
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Answer: Population density refers to the number of individuals per unit area.
Explanation:
3. How are the long DNA molecules found in eukaryotes packed into short chromosomes?
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Explanation:
DNA is tightly wound around histones,forming nucleosomes. Nucleosomes are tightly coiled and supercoiled to form chromosomes.
What cell parts do both plants and animals have?
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Answer:
Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
A student adds 10 drops of a copper sulfate and sodium hydroxide solution to a test tube containing chicken broth. The solution undergoes a color change from blue to purple.
The presence of which organic molecule is indicated by the color change of the solution?
glycogen
protein
nucleosome
fatty acids and glycerol
Answers
The molecule whose presence is indicated is protein.
What is the food test?The food test refers to the chemical methods that we could use to obtain the kind of food substance that we have in a sample. Let us recall that food is a chemical substance hence it is capable of chemical interaction with other chemicals.
One of the kind of food tests is the tests for proteins in which copper sulfate and sodium hydroxide solution is used. In this test, the color of the solution turns from blue to purple.
Hence the molecule whose presence is indicated is protein.
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The animal functional genomics laboratory at mississippi state university conducts genetic research involving farm animals. The results can be used to genetically modify commercially useful animals. Which idea can best be used to support this research?.
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Genetic changes can be utilised to create or select potentially valuable features in an organism.
This is the primary benefit of genetically modified organisms. For example, genetic alterations can be developed to increase milk supply or improve illness resistance in cows.
Due to genetic modifications, milk productivity per cow has more than doubled in the last 40 years, and many cows now produce more than 20,000 kg of milk per lactation.
This demonstrates that genetic modifications to increase milk output in cows have already happened.
Genomics is the study of how a person's biological knowledge can be used to enhance clinical care, health outcomes, and individualised therapy.
The analysis of a person's or other organism's entire collection of DNA (including all of the genes).
Almost every cell in the human body carries a full copy of the genome. The genome contains all of the information that a person requires to develop and grow.
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In which part of the cell does photosynthesis happen?
Answers
Answer:
chloroplasts
Explanation:
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Question 1: Basic Solow Growth Model Consider the Solow growth model without population growth or technological change. All the assumption of basic Solow Growth model applies (the ones we discussed in class). The saving rate is given by s and and the depreciation rate is given by (δ). The production function is given by Y=K
α
L
(1−α)
. Let k denote capital per worker, y denote output per worker, c denote consumption per worker, and i denote investment per worker. 1. What is the per-worker production function? 2. Provide equation of motion for this model. 3. Find the steady-state capital per worker (k
∗
). 4. Find the steady-state level of output per worker (y
∗
). 5. Find the steady-state level of consumption per worker (c
∗
). 6. Draw a well-labeled figure showing steady state capital per worker, steady state output per worker, and steady-state consumption per worker. (You will not receive full credit if it is not well-labeled) 7. In your own words, explain two implications of this Basic Solow Growth Model (no population growth and no technological growth).
Answers
1.The per-worker production function in the Basic Solow Growth Model can be written as: Y = K * α * L * (1 - α)
where Y is output per worker, K is capital per worker, L is labor, and α is the elasticity of output with respect to capital. 2.The equation of motion for this model is: dY/dt = s(Y-c) - (δ+1)K. where s is the savings rate, c is consumption per worker, δ is the depreciation rate, and t is time.
3.The steady-state capital per worker (k∗) is given by:
k∗ = δ + 1
4.The steady-state level of output per worker (y∗) is given by:
y∗ = αk∗L
where α is the elasticity of output with respect to capital.
5.The steady-state level of consumption per worker (c∗) is given by:
c∗ = s(y∗-L)
6.A well-labeled figure showing steady state capital per worker, steady state output per worker, and steady-state consumption per worker would include the following:
Steady-state capital per worker (k∗) on the x-axis and steady-state output per worker (y∗) on the y-axis.
A line showing the relationship between capital and output in the steady state.
A point representing the steady-state level of capital per worker (k∗) and a point representing the steady-state level of output per worker (y∗).
A line showing the relationship between consumption and output in the steady state.
A point representing the steady-state level of consumption per worker (c∗) and a point representing the steady-state level of output per worker (y∗).
Labels for each point and line, including the variables they represent and the equations that relate them.
7.The implications of the Basic Solow Growth Model with no population growth and no technological growth are:
The economy grows at a constant rate determined by the rate of return on investment in capital.
The steady-state level of output per worker is determined by the elasticity of output with respect to capital and the level of capital per worker.
The steady-state level of consumption per worker is determined by the savings rate and the level of output per worker.
The model predicts that there is a positive relationship between capital and output, and a negative relationship between consumption and output in the steady state.
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12. The fine adjustment of the light microscope is used to
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A benefit of moderate physical activity is the reduction in risk of hypokinetic disease and early death.
Answers
An individual with sedentary lifestyle might be at risk for hypokinetic diseases such as high blood pressure. Moderate physical activity such as walking and biking gives a great benefit to avoid such risk. Moderate physical activity can reduce major medical conditions that might lead to early death. Too little movement or activity might lead to hypokinetic diseases. Regardless of the intensity of the physical activity, it will lower the risk of an early death due to hypokinetic diseases.
what changes occur in the blood ph during hyperventilation?
Answers
During hyperventilation, there is an increase in blood pH due to a decrease in carbon dioxide levels in the blood. When we breathe in, oxygen from the air we inhale moves from the lungs into the bloodstream, and carbon dioxide from the bloodstream moves into the lungs to be exhaled.
During hyperventilation, the rate and depth of breathing increase, which results in excess carbon dioxide being breathed out. This reduces the amount of carbon dioxide in the blood, leading to a decrease in the partial pressure of carbon dioxide (PCO2).Since carbon dioxide and water react to produce carbonic acid, a decrease in PCO2 decreases the production of carbonic acid and thus reduces the amount of acid in the blood.
This results in an increase in blood pH, making it more alkaline. The increase in pH can lead to symptoms such as lightheadedness, dizziness, and tingling in the hands and feet.In summary, hyperventilation leads to a decrease in PCO2 levels, which in turn reduces the production of carbonic acid and leads to an increase in blood pH.
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The pedigree shows the phenotypes for hair color in a family over four generations. In this pedigree, light hair color is the recessive allele, and dark hair color is the dominant allele.
Answers
The pedigree shows that over the four generations, there are both dominant and recessive alleles present.
What is an Allele?
An allele is a genetic variety. Alleles can be either dominant or recessive, and they determine a person's hereditary characteristics such as eye color, hair color, and other physical traits. Every gene has at least two alleles, which are inherited from one's parents. Alleles can be the same or different, and the presence of certain alleles can affect the expression of a trait.
In the first generation, both the father and mother have dark hair color, showing a dominant allele. In the second generation, two of the children have dark hair color, again showing a dominant allele, while the other two children have light hair color, showing a recessive allele. In the third generation, two of the children have dark hair color, again showing a dominant allele, while the other two children have light hair color, showing a recessive allele. Finally, in the fourth generation, two of the children have dark hair color, again showing a dominant allele, while the other two children have light hair color, showing a recessive allele.
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As a soccer player dodges players of the opposite team on the field, her joints must be stabilized in many different directions. Which tissues help to stabilize joints in motion? Check all of the boxes that apply.
muscles
blood vessels
ligaments
nerves
Answers
Answer: Ligaments and muscles
Explanation:
I said what I said
Answer: muscles and ligaments
Explanation:
Does a common cold have a localized inflammatory response
Answers
In the common cold we can say that there is a localized inflammatory response as is focused on the airways, rarely gets to the bronchi or lungs, this happens when there are complications, even more, when complications occur, these are contained in the respiratory system.
What organelle controls a cell's packaging, storage and shipping functions?
endoplasmic reticulum (ER)
ribsomes
Golgi apparatus
vesicles
Answers
Answer:
Golgi apparatus
Explanation:
Answer:
Golgi apparatus controls a cell's packaging, storage and shipping functions
sharing of electrons in the outer energy levels of two atoms results in?
Answers
Answer:
A covalent bond
Explanation:
A covalent bond happens if the attractions are strong enough in both atoms and if each atom has room for an electron in its outer energy level
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Which disorders can or can't be selected to be caused by inbreeding?
albinism—a genetic disorder that causes the absence of skin pigment
bone fracture—an injury to the bones from a fall or an accident
flu—a disease caused by a virus
hemophilia—a genetic disorder that prevents blood from clotting
vertigo—a sensation of things spinning
Answers
Answer:
albinism is the answer.
What is the structure that makes bacteria unable to properly read and make protein from human dna?.
Answers
Answer:
The right answer is introns. Prokaryotic genes are usually devoid of introns and so while cloning human DNA for its expression and protein production in bacteria.
Explanation:
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you are on a committee that is planning whether or not to build a dam on a nearby river to produce hydroelectric power. describe some of the advantages and disadvantages you should consider before deciding to build the dam.
Answers
Dams preserve water, generate power, cause mass migration, and are expensive. Dams regulate water supply for domestic, industrial, and electric uses.
What are the advantages and disadvantages of dams?A dam is a structure that stops or slows the flow of water on the surface or in the ground.
Advantages of building a dam are:
Water flow is controlled and used to meet household, agricultural, and industrial demands.The reservoir that was formed behind the dam can be utilized for a variety of purposes, including irrigation, water sports, and even other forms of recreational pursuits.The production of energy by dams does not result in any pollution because there is no release of greenhouse gases during this process.Dams are utilized in conjunction with the hydroelectric plant in order to produce electricity.Disadvantages are:
The construction of dams takes many years, which results in a decrease in the quality of life for individuals who live in areas that are now undergoing construction.The process of constructing dams is one that is both time-consuming and incredibly expensive.The building of massive dams causes significant damage to the surface of the earth, which in turn has negative effects on geological processes.People are leaving in large numbers because they don't want to live in the area where the dam is going to be built.Learn more about dams, here:
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what are Punnet squares and why are they important in genetics?
Answers
Answer:
Punnet squares are is used to predict the genotypes of a particular cross.They are important in genetics because they find the offspring of a genotype.
Explanation:
Answer:
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.
Explanation:
13. The synthesis of ATP from ADP results in:
a. ADP released
b. ADP storage
c. energy released
d. energy storage
Answers
Answer:
IG : (c)
Explanation:
If a cell needs to spend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP (Adenosine di-phosphate) + phosphate. The energy holding that phosphate molecule is now released and available to do work for the cell.
whales and dolphins navigating underwater with sound waves is called what?