Eukaryotic cells have a nucleus, while prokaryotes have DNA that floats around inside the cell.
Difference between prokaryote and eukaryoteEukaryotic cells contain membrane aound cell organelles, such as the nucleus, while on the other hand, prokaryotic cells do not have membrane around nucleus. Eukaryotes have mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA whereas prokaryote have no organelles.
So we can conclude that Eukaryotic cells have a nucleus, while prokaryotes have DNA that floats around inside the cell.
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Answer:
Eukaryotic cells have a nucleus, while prokaryotes have DNA that floats around inside the cell.
Explanation:
Did it on my test
What is the probability of producing a tall pea plant from a genetic cross between two heterozygous tall pea plants (tall is dominant)?
25%
50%
75%
100%
Answer:
100%
Explanation:
There are 4 individual outcomes. (s = short)
TT
TT
Ts
Ts
So its 100% (The dominant is always expressed unless the genotype is ss)
What is a negative externality?
A)Negative externalities occur when the social cost of a good or service is higher than the private cost.
B)Negative externalities are goods or services that one consumer can limit another consumer's use of.
C)Negative externalities occur when the social cost of a good or service is lower than the private cost.
D)Negative externalities are goods or services that are subject to the free-rider problem.
Answer:
Negative externalities occur when the social cost of a good or service is higher than the private cost.
Explanation:
i got the wrong answer the first time lol
For economics class the answer is : Negative externalities occur when the social cost of a good or service is higher than the private cost.
:)
Which will form an ionic bond?
1. two carbon atoms
2. any two atoms
3. a positive ion and a negative ion
4. two positive ions
explain how blood flow in the skin helps to maintain a constant body temperature in very hot conditions.
Answer:
The skin immense blood supply helps regulate temperature
Explanation:
The skin immense blood supply helps regulate temperature
A(n) ___________________ is a substance with specific chemical and physical properties.
Neutron
Proton
Electron
Element
Answer: Elements
Explanation: Elements are unique forms of matter with specific chemical and physical properties that cannot be broken down into smaller substances by ordinary chemical reactions.
The approximate mass distributions of a female at ages 10 and 20 are shown in figure p8. 13. The masses quoted for portions of the arms and legs are for each.
For females, the masses for the arms is usually smaller than the masses for the legs because the leg bones are denser than the arm bones.
What is mass?Mass is defined as the quantity of matter in a body.
The mass distribution of human body shows that the liberal of the human body usually have a higher mass than the upper body.
For female, the masses for the arms is usually smaller than the mass for the legs because the leg bones are denser than the arm bones.
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Look up the MSDS (Material Safety Data Sheet) for naphthalene. This can be done easily by Googling "naphthalene MSDS" since all manufacturers of naphthalene have to make this safety information available to purchasers. Alternatively, printed MSDS sheets are available in the chemistry department's virtual library/computer lab. What are the safety hazards of naphthalene? Where should your test tube (and its contents) go after you have completed the experiment?
Naphthalene poses hazards of respiratory irritation, skin and eye irritation, and toxicity if ingested. After the experiment, dispose of the test tube and its contents as hazardous waste according to local regulations.
Naphthalene is a white solid aromatic hydrocarbon commonly used as a moth repellent. Its Material Safety Data Sheet (MSDS) typically highlights the following safety hazards:
1. Inhalation: Naphthalene can be harmful if inhaled, causing respiratory irritation, dizziness, nausea, and headache.
2. Skin Contact: Direct contact may lead to skin irritation, redness, and potential allergic reactions.
3. Eye Contact: Naphthalene can cause eye irritation, redness, and discomfort.
4. Ingestion: Swallowing naphthalene can be toxic, leading to abdominal pain, nausea, vomiting, and potential damage to internal organs.
After completing an experiment involving naphthalene, it is important to dispose of the test tube and its contents properly. Naphthalene should be collected and disposed of in accordance with local regulations for hazardous waste. It should be placed in a designated waste container or taken to an appropriate waste disposal facility for safe handling and disposal. Proper precautions should be taken to prevent further exposure or environmental contamination. Always consult the manufacturer's instructions and local regulations for specific disposal guidelines.
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what is the impact of drug abuse on an individual? ( pls help I must submit this assignment tomorrow)
Nausea and abdominal pain, which can also lead to changes in appetite and weight loss. Increased strain on the liver, which puts the person at risk of significant liver damage or liver failure. Seizures, stroke, mental confusion and brain damage. Lung disease.
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Which kind of reaction is photosynthesis
O light-independent
O temperature-independent
O exothermic
O endothermic
Answer:
endothermic reaction l am sure Please mark my answer as a brainliest.❤❤❤❤ Please follow me.Incinerating or burning trash is the best way to get rid of the majority of it. True or False
Answer:
Emissions from burning waste worsen environmental inequalities, create ... and municipal solid waste incinerators have sparked resistance in many places. ... Nonetheless, 72 incinerators are still operating today in the U.S. Most of ... Wastes that are not recycled or composted typically are either burned or ... So false
Explanation:
How would the nitrogen cycle be disrupted if humans prevented the process of denitrification from occurring? A The amount of atmospheric nitrogen (N2) would decrease, and nitrogen-fixing bacteria would die off. B The amount of atmospheric nitrogen (N2) would remain constant, and nitrogen-fixing bacteria would remain constant. C The amount of atmospheric nitrogen (N2) would remain constant, and nitrogen-fixing bacteria would increase. D The amount of atmospheric nitrogen (N2) would increase, and nitrogen-fixing bacteria would decrease
If humans prevent the process of denitrification from occurring, the nitrogen cycle would be disrupted in a way that the amount of atmospheric nitrogen (N2) would increase, and the population of nitrogen-fixing bacteria would decrease. This disruption would lead to an imbalance in nitrogen availability and potentially affect the growth and health of ecosystems.
The correct option is D The amount of atmospheric nitrogen (N2) would increase, and nitrogen-fixing bacteria would decrease
Denitrification is a critical step in the nitrogen cycle where certain bacteria convert nitrates (NO3-) back into atmospheric nitrogen (N2). This process occurs in oxygen-depleted environments such as wetlands and soils. Denitrification helps regulate the amount of nitrogen available in ecosystems and prevents an excessive buildup of nitrates, which can have harmful effects.
If denitrification is prevented from occurring, nitrates would accumulate in the environment, leading to an increase in the amount of atmospheric nitrogen (N2). Without the conversion of nitrates back into atmospheric nitrogen, the balance in the nitrogen cycle would be disrupted. Additionally, the population of nitrogen-fixing bacteria, which play a crucial role in converting atmospheric nitrogen into usable forms for plants and other organisms, would decrease. This reduction in nitrogen-fixing bacteria could further impact the availability of nitrogen for various biological processes.
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Put the following list of words in order from largest to smallest according to the Organization of Organisms
1. Deer brain cells
2. Deer brain
3. Deer
4. Deer nervous system
5. Deer nerve tissue
Answer:
That list largest to smallest would be: Deer, Deer nervous system, Deer brain, Deer nerve tissue, and Deer brain cells
Explanation:
The Organization of Organisms from smallest to largest is: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.
The molecule of water is described as a polar molecule polar molecules have an unequal sharing of electrons explain how this unequal sharing is present by using our water molecule graphic below
The unequal sharing of electrons means that the atoms are unsymmetrically arranged within the molecules like water. The shape of the water molecule has two poles a positive charge on the hydrogen pole and a negative charge on the oxygen pole.
What is a Polar molecule?A Polar molecule may be defined as a type of molecule that has a charge on one side of the molecule, that is not canceled out. Apart from this, polar molecules have a region of partial charge. One end is slightly positive one end is slightly negative.
The oxygen atom in a water molecule has a stronger pull on the negative bonding electrons the oxygen atom has a slightly negative charge and the hydrogen atom has a positive charge. Due to this, unequal sharing of electrons may have arisen which is called a polar bond or dipole.
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what statement describes the reaction of hydrogen peroxide
With certain organic compounds, hydrogen peroxide reacts to form hydroperoxides or peroxides,
What is the reaction of hydrogen peroxide?Hydrogen peroxide in a saturated solution decomposes on warming to give oxygen, on the report of the equation: several of which are used to begin polymerization reactions. In most of its reactions, hydrogen peroxide oxidizes other material, although it is itself oxidized by a few compounds, such as potassium permanganate.
explanation. Hydrogen peroxide is a colorless liquid at room temperature with a bitter taste. little amounts of gaseous hydrogen peroxide occur naturally in the air. Hydrogen peroxide is shaky, decomposing readily to oxygen and water with the release of heat.
So we can conclude that the decay of hydrogen peroxide is an example of a disproportionation reaction.
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Which of the following types of mutations does not belong with the others?
Answer:
options please
Explanation:
Theres nothing to pick from
Which vitamin is involved in the absorption of calcium from foods?
Answer:
Vitamin D is a required vitamin for calcium absorption.
Which of the following is a reactant in photosynthesis?
a. O2
b. C6H12O6
c. COOH
d.CO2
Part E In a typical brightfield microscope (seen in the animation) , at which point does magnification begin?
a. The objective lens
b. The ocular lens
c. The lamp
d. The stage
e. The condenser lens
In a typical brightfield microscope, magnification begins at the condenser lens.
The condenser lens is responsible for focusing the light onto the specimen, creating a bright background and enhancing contrast. Once the light passes through the condenser lens, it travels through the specimen and then through the objective lens, which further magnifies the image. The magnified image is then viewed through the ocular lens, which also contributes to the overall magnification. However, the initial magnification begins with the condenser lens. The lamp provides the necessary light source for the microscope, while the stage holds the specimen in place and allows for movement and adjustment. Overall, the brightfield microscope is a commonly used tool in scientific research and allows for the visualization of a variety of specimens at high magnification.
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In the United
States, what is
the AVERAGE
beef cow herd
size?
A. 10 head
B. 25 head
C. 40 head
D. 70 head
Answer:In the United States the average cow herd size is C.40 herds
Explanation: 40 herds is the average
The physical characteristics of an organism are its
Answer:
appearance, development, and behavior
Explanation:
The phenotype, similar to the genotype, can be observed in two senses: wider and narrower. In a broader sense, a phenotype is a set of all morphological and physiological properties by which an organism is recognized and by which it differs from other organisms.
When we look at only one trait, then it is the narrower meaning of the phenotype. What will be the influence of genotype on phenotype depends not only on the genetic basis but also on the action of environmental factors in which the organism develops.
Which statement about diamond is correct? - Each carbon atom is bonded to three other carbon atoms in a single layer - Each carbon atom is bonded to four other carbon atoms - Layers of carbon atoms with no covalent bonds between the layers - Carbon ions held together by strong electrostatic forces - Pairs of carbon atoms with no covalent bonds between the molecules
Answer: option b
each carbon atom is bonded to four other carbon atoms creating a rigid and compact structure.This makes diamond the hardest known substance
Explanation:
i hope it will help you
why did 19th and early 20th century biologists fail to recognize the importance of variation in beak size among darwin's finches in the galápagos?
Biologists of the 19th and early 20th centuries overlooked beak size variation in Darwin's finches due to limited understanding of evolution and lack of detailed observations, but later recognized its significance with improved tools and studies.
The 19th and early 20th century biologists failed to recognize the importance of variation in beak size among Darwin's finches in the Galápagos for several reasons:
1. Limited understanding of evolution: During that time, the concept of evolution by natural selection was still relatively new and not widely accepted. Biologists had limited knowledge about the mechanisms of evolutionary change and the role of natural selection in shaping populations.
2. Lack of detailed field observations: The Galápagos Islands are geographically isolated, and conducting extensive field studies and collecting detailed data on the finches' characteristics was challenging during that period. The biologists of that time did not have access to comprehensive observations or sufficient data on the variation in beak size among the finches.
3. Focus on species-level classification: The dominant mindset among biologists of that era was focused on species-level classification rather than studying variation within species. They tended to emphasize fixed characteristics that could differentiate one species from another, rather than recognizing the importance of variation within populations.
4. Lack of analytical tools: Statistical and quantitative methods for analyzing and interpreting biological data were still developing. Without appropriate analytical tools, it was difficult for biologists to assess and quantify the significance of variations in beak size among Darwin's finches.
It was not until later in the 20th century, with the advent of molecular biology, improved field studies, and the integration of evolutionary theory, that the significance of variation within populations and its role in driving evolutionary change became more widely recognized and appreciated.
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are the major lipids of plasma membranes. - a. Triglycerides - b. Phospholipids - c. Fatty acids - d. Steroids
The major lipids of plasma membranes. are called b. Phospholipids, which form a bilayer in the cell membrane.
What is the phospholipid bilayer in the cell membrane?
The phospholipid bilayer in the cell membrane is an arrangement of phospholipids in order to form biological barriers that allow the selective movement of substances across the internal medium of the cell and the surrounding environment.
A phospholipid is composed of a phosphate polar head and fatty acids that are located on the internal side of the cell membrane because it is hydrophobic (polar phosphate heads are in contact with surrounding water which stabilizes the cell membrane).
Therefore, with this data, we can see that the phospholipid bilayer in the cell membrane is arranged in the sense that the phosphate heads of these biomolecules are located on the outside and fatty acids inside.
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what are some Habituation Insight Learning differences??
Cognitive form of learning involving mental rearrangement or restructuring of elements in a problem to achieve a sudden understanding of the problem and arrive at a solution is called insightful learning.
What is meant by the habituation?Examples of habituation learning is that :You may become habituated to loud sounds, bright lights, strong odors or physical touch. Learning to ignore and filter out stimuli that are irrelevant, unimportant may allow you to devote more of your attention and cognitive resources to other things, and including things that may signal danger.
There are two types of habituation that are :short-term and long-term.
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Suppose we had a genetic experiment where we hypothesize the 9:3:3:1 ratio of characteristics A, B, C, D. The hypotheses to be tested are H0: p1 = 9/16, p2 = 3/16, p3 =3/16, p4 =1/16, H1: at least two proportions differ from those specified. A sample of 160 offspring are observed and the actual frequencies are 82, 35, 29, and 14, respectively.
To test the hypotheses regarding the observed frequencies of characteristics A, B, C, and D, we can use a chi-squared goodness-of-fit test. This test will help determine whether the observed frequencies significantly deviate from the expected frequencies based on the hypothesized ratios.
Let's proceed with the hypothesis test:
Step 1: Define the hypotheses:
H0: p1 = 9/16, p2 = 3/16, p3 = 3/16, p4 = 1/16 (the observed frequencies follow the expected 9:3:3:1 ratio)
H1: At least two proportions differ from those specified.
Step 2: Set the significance level (α):
The significance level, denoted as α, determines the threshold for deciding whether to reject the null hypothesis. Let's assume a significance level of α = 0.05, which is a common choice.
Step 3: Calculate the expected frequencies:
Based on the hypothesized ratios, we can calculate the expected frequencies for each characteristic. Since the sample size is 160, we multiply each proportion by 160 to obtain the expected frequencies:
Expected frequency for A: (9/16) * 160 = 90
Expected frequency for B: (3/16) * 160 = 30
Expected frequency for C: (3/16) * 160 = 30
Expected frequency for D: (1/16) * 160 = 10
Step 4: Perform the chi-squared test:
We can now calculate the chi-squared statistic using the formula:
χ² = Σ((O - E)² / E)
where Σ represents the sum over all categories, O is the observed frequency, and E is the expected frequency.
For our example:
Observed frequencies: O(A) = 82, O(B) = 35, O(C) = 29, O(D) = 14
Expected frequencies: E(A) = 90, E(B) = 30, E(C) = 30, E(D) = 10
Calculating the chi-squared statistic:
χ² = ((82-90)² / 90) + ((35-30)² / 30) + ((29-30)² / 30) + ((14-10)² / 10)
Step 5: Determine the critical value:
The critical value is obtained from the chi-squared distribution table or using statistical software. The degrees of freedom for this test are equal to the number of categories minus 1. In our case, there are 4 categories, so the degrees of freedom (df) = 4 - 1 = 3.
With α = 0.05 and df = 3, the critical value is approximately 7.815.
Step 6: Make a decision:
Compare the calculated chi-squared statistic to the critical value. If the calculated value is greater than the critical value, we reject the null hypothesis (H0). Otherwise, we fail to reject H0.
If the calculated chi-squared statistic is less than or equal to the critical value, we fail to reject the null hypothesis (H0), which means the observed frequencies do not significantly deviate from the expected frequencies based on the hypothesized ratios.
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How would the amount of oxygen absorbed by the cells be different in an athlete who is blood doping, compared to a normal athlete?
The amount of oxygen absorbed by the cells is different in an athlete who is blood doping compared to a normal athlete because this last has less oxygen in the blood to carry out the process of cellular respiration.
Why oxygen is fundamental to getting energy in an athlete?Oxygen is fundamental to getting energy in an athlete because it is a reactant of the process of cellular respiration, thereby it is required to generate ATP, the energy coin of the aerobic cells, and thus produce muscle contraction during physical exercise.
Therefore, with this data, we can see that oxygen is fundamental to getting energy in an athlete and blood doping may increase the level of oxygen intake, thereby leading to a higher production of energy by the same unit of time and thus leading to higher (and illicit) performance.
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do different colors of light affect the direction of a growth plant
hypothesis:
scientific question:
Explanation:
A common question is: Does the color of light affect plant growth? The color of light DOES affect plant growth, but the effect is more noticeable under low light intensity. Red & blue light are most effective for plant growth, while yellow & green have minimal effect. UV light can damage plants, ca
Sarah and Jane were playing basketball. They collided and fell. Sarah’s knee was lightly bruised. Jane’s elbow was scratched, causing a little blood to ooze out. After a few days, Jane observed pus formation around the scratch on her elbow, while Sarah’s knee was fine. The pus formation on Jane’s elbow is a result of {blank}. The receptors on the {blank} sensed the pain that Jane experienced.
{blank#1}
an inflammatory response due to the entry of an antigen.
the secretion of sebum due to the skin getting scratched.
the action of hormones on the site of wound.
{blank#2}
epidermis
dermis
hypodermis
The pus formation on Jane’s elbow is a result of an inflammatory response due to the entry of an antigen. The receptors on the dermis sensed the pain that Jane experienced.
What is Dermis?This is refereed to as the middle layer of the skin which comprises of receptors and also helps to protect the body from foreign bodies and other forms of pathogens.
Pus generated from injuries are as a result of an acute inflammatory response and the pain sensation derived is as a result of the receptors found in the dermis thereby making them the correct set of choices.
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In mycorrhizal mutualisms between plants roots and fungi Group of answer choices the fungus infects the plant roots, stimulating plant growth through myc factors that act as growth hormones in the plant. the plant supplies water to the fungus and the fungus supplies essential amino acids to the plant. the plant supplies carbohydrates to the fungus and the fungus supplies phosphorus and nitrogen to the plant. the plant protects the fungus from predation and the fungus supplies carbohydrates to the plant.
In mycorrhizal mutualisms between plant roots and fungi, the plant supplies carbohydrates to the fungus and the fungus supplies phosphorus and nitrogen to the plant.
Mycorrhizal mutualisms are symbiotic associations between plant roots and certain fungi. These interactions are beneficial for both parties involved. In this specific type of mycorrhizal mutualism, known as ectomycorrhizae, the plant provides the fungus with carbohydrates, which are synthesized through photosynthesis in the plant's leaves. These carbohydrates, such as sugars, are transported down to the roots and are then shared with the fungus.
In return, the fungus supplies the plant with essential nutrients, particularly phosphorus and nitrogen. The fungus has a larger surface area for absorption, allowing it to scavenge and acquire these nutrients more efficiently from the soil. The fungus delivers these nutrients to the plant's roots, enhancing the plant's nutrient uptake and overall growth.
While there are other types of mycorrhizal mutualisms, such as arbuscular mycorrhizae, where the nutrient exchange mechanisms may vary, in the specific scenario described, the primary exchange is the provision of carbohydrates by the plant and the supply of phosphorus and nitrogen by the fungus. This mutualistic relationship is crucial for nutrient acquisition and growth enhancement in many plant species.
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A 52-year-old woman has difficulty initiating voluntary movements. She can clearly state what she intends to do, describe exactly how she would do it, and picture herself doing it easily. When she is able to begin the motion, she can complete it smoothly and accurately, but she has difficulty beginning the motion. If the difficulty arises from a defect in one particular area of the nervous system, which area is most likely to be involved
Answer:
Basal Ganglia
Explanation:
The Basal ganglia function is to regulate the voluntary movements or autonomic movement. This is done by receiving and transmission of impulses. Impulses are received for upcoming movement from the cerebral cortex and then process and adjust from where it is convey to the thalamus which then relays this information back to the cortex. The well defined movement instruction is finally sent to the skeletal muscles through the tracts of the pyramidal motor system. It also function in planning and modulation of movement, memory and eye movement.
There are five types of basal ganglia corpus striatum, claustrum, amygdala, substantia nigra and subthalamic sails which all function together.