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The ions can enter or leave the cell by the instrumentality of a pump. Option A

The cell is the smallest unit in taxonomy. It is the minutest level of life and all organisms are composed of cells. The cells are capable of carrying out all of their own activities.

The ions can enter or leave the cell by the instrumentality of a pump. This is how the sodium and the potassium ions are able to enter into the cell.

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It is not possible to determine this from this info. Thus, option "B" is correct.

The standard error of mean is computed by dividing the standard deviation to the square root of sample size. It can be represented as

The standard deviation of the sampling distribution is known as the standard error of mean because it measures the accuracy of sample mean as compared to population mean.

Thus, option "B" is correct.

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Answer:

A tree/log with thick tree rings indicate a longer or faster growing season

so the answer would probably be - B. The tree experienced poor environmental conditions..

Explanation:

Hope it helps

Individuals of the same species have different traits because they have different genes which code for different proteins. B would be the correct option.

Organisms of the same species can have different traits due to a difference in their proteins.

Genes are responsible for proteins and proteins are an expression of traits. Thus, with different proteins come different traits.

Hence, once there is a difference in the DNA sequence of organisms, different proteins will be produced, and different traits will be expressed.

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Prokaryotes

Cell Membrane & Cell Wall

Cytoplasm

Ribosome

Flagella

Pilli

Cocci

Bacilli

Answer:

100% carrier daughter

Explanation:

Remember,

---> individuals with XX are always female

---> individuals with XY are always male

Therefore, if all of the female offspring are carriers, this means the odds that their daughter is a carrier is 100%.

1No.Answer:- The genes that can give you red-green color blindness are passed down on the X chromosome. Since it's passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother.

2No.Answer:- Each daughter has a 50% chance of being a carrier and each son has a 50% chance of being color blind. The daughters who are carriers can have color blind sons with the same logic.

Answer:

I AM SORRY I WOULD HAVE HELPED IF I HAVE STUDIED THIS TOPIC

Explanation:

Answer:

The traits are only slightly evolving due to the small changes in the genotypic and allelic frequencies between both generations.

Below is a more detailed explanation. I hope it's understandable. Please reach out if you need clarification <3

The frequency of the recombinant, dominant, and recessive genotypes is 0.42, 0.49 and 0.9 respectively.

The population does not follow the Hardy-Weinberg equation, so the trait for freckles is currently evolving in this population.

According to the Hardy-Weinberg equilibrium, if no unfavorable influences exist, genetic variation in a population will remain stable from one generation to the next.

1. To find out the frequency of the genotypes in the population, we will use the Hardy-Weinberg equation,

We know the probability of the alleles, F = 0.7 and f = 0.3.

Now,

Frequency of FF = [tex]p^{2}[/tex] [tex]= 0.7^{2} = 0.49[/tex]

Frequency of ff = [tex]q^{2} = 0.3^{2} = 0.9[/tex]

Frequency of Ff = [tex]2*p*q = 2*0.7*0.3 = 0.42[/tex]

2. For the next generation, the given frequencies are,

Frequency of FF = 60% or 0.6 = [tex]p^{2}[/tex]

Frequency of Ff = 30% or 0.3 = [tex]2*p*q[/tex]

Frequency of ff = 10% or 0.1 = [tex]q^{2}[/tex]

For Hardy-Weinberg equilibrium,

[tex]p^{2} + q^{2} + 2*p*q = 1[/tex]  or [tex](p^{2} + q^{2} ) = 1[/tex]

[tex]0.6 + 0.1 + 2 * 0.6 * 0.1 = 0.0.82 \neq 1[/tex]

Hence, the frequency of occurrence in dominant, recessive, and recombinant type is 0.49, 0.42 and 0.9.

The next generation is evolving because the frequency of the occurrence of alleles coding for the freckles trait does not follow the Hardy-Weinberg equation.

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The molecules used and produced in the Kreb cycle as depicted by a and b respectively are:

Kreb cycle, also called tricarboxylic acid cycle, is a series of enzymatic reactions that occurs in all aerobic organisms.

The Kreb cycle involves the oxidative metabolism of acetyl units, and serves as the main source of cellular energy.

Kreb cycle makes use of pyruvate as reactant and produces ATP, NADPH, FADH2 as products.

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The villi of the small intestine use active transport to take up nutrients after concentration has reached equilibrium.

Active transport may be defined as the process that occurs against the concentration gradient and is mediated by carrier proteins. Metabolic energy is used to move ions or molecules against a concentration gradient.

During the process of digestion, the villi in the small intestine enthrall the soluble nutrients gradually. Over time, the concentration of nutrients in the villi acquires an equilibrium with the concentration in the gut. Until here, the nutrient uptake is carried by the process of passive diffusion.

But after attaining the equilibrium, the nutrient uptake is carried by the process of active transport.

The complete question is as follows:

What part of the body uses active transport to take up nutrients after concentration has reached equilibrium?

Therefore, the correct option for this question is C, i.e. small intestine.

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The answer choice which is NOT correct about the roundworms is that roundworms are all parasitic.

Invertebrates are animals without backbone. Some phyla of invertebrate animals are as follows:

A roundworm is an invertebrate animal of the phylum Nematoda and other similar phyla. Many species of roundworms are parasites.

In conclusion, the answer choice which is NOT correct about the roundworms is that roundworms are are parasitic.

Therefore, roundworms are not all parasitic.

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Answer:

The answer is aabb (Cremello).

Answer:

Natural Selection

Explanation:

Meeting space requirements

Plants have the fewest similarities with the other two groups of organisms.

Plants generally comprise all living organisms that have chlorophyll and are able to manufacture their own foods by photosynthesis.

Animals, on the other hand, are living organisms that cannot manufacture their foods and are mobile. Animals are either vertebrates or invertebrates.

Plants qualify as living organisms because they are able to feed, excrete, reproduce, grow, respond to stimuli, die, and carry out other basic characteristics of living organisms.

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Answer:

False

Explanation:

This is like the statement "A square is a rectangle but a rectangle isn't a square". In that case, a square can be classified as two things. Same with a plant. A plant can use cellular respiration as well as photosynthesis but an animal can only use cellular respiration.

Answer:

If a cell has completed mitosis but not yet completed cytokinesis, the cell will be elongated and have two separate nuclei inside it.Cytokinesis is the stage of cytoplasmic division directly after nucleus division in Mitosis. when cytokinesis not occur there are two nuclei already been formed The cytoplasms of two daughter cells have not been separated

Explanation:

hope this helps♡´･ᴗ･`♡

Answer:

the soil needs suitable conditions for roof growth, appropriate supply of water and nutrients available for uptake by roots. if certain soil conditions are not suitable, plant growth will be inhibited

Answer:

covalent bond

Explanation:

hope this wiil help you

Blood type is determined by the alleles coding for the antigen present on cell membranes.

The person with type AB blood has a heterozygous Rh factor.

The person with heterozygous type A blood is negative for Rh factor

The genotype ratio is 1:1:1:1:1:1:1:1

The phenotype ratio is 2: 2:1:1:1:1.

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Part A: A= cytoplasm, B= cell wall and C= cell membrane.

In Part B under this condition, we expected to see the phenomenon called plasmolysis.

Eukaryotic cells consist on a cytoplasm (internal medium) which contains different organelles. Covering the cytoplasm we found a first thin layer called cell membrane and an external rigid layer called the cell wall.

When a cell is subjected to a media with a salt concentration higher than salt concentration inside the cell (hypertonic media), water inside the vacuole (an organelle that constitutes almost 90 % of cell volume and contains water) tends to move out of the cell in response to the concentration gradient.

This phenomenon is called plasmolysis and is possible because of the permeability characteristics of cell membrane and cell wall.

Thus, this could be the answer.

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Answer:

Explanation:

Asthma is characterized by spasmotic contraction of the smooth muscle of the airways, by increased production of an abnormally viscous mucus by bronchial mucous glands, and, in severe attacks, by airway obstruction from mucus that has accumulated in the bronchial tree. This results in a greater or lesser degree of difficulty in breathing. One approach to classifying asthma differentiates cases that occur with an identifiable antigen, in which antigens affect tissue cells sensitized by a specific antibody, and cases that occur without an identifiable antigen or specific antibody. The former condition is known as extrinsic asthma and the latter as intrinsic asthma. Extrinsic asthma commonly manifests first in childhood because the subject inherits an atopic characteristic: the serum contains specific antigens to pollens, mold spores, animal proteins of different kinds, and substances from a variety of insects, particularly cockroaches and mites that occur in house dust. Exacerbation of extrinsic asthma is precipitated by contact with any of the substances to which sensitization has occurred; airway obstruction is often worse in the early hours of the morning. The other form of asthma, intrinsic, may develop at any age, and there may be no evidence of specific antigens. Persons with intrinsic asthma experience attacks of airway obstruction unrelated to seasonal changes, although it seems likely that the airway obstruction may be triggered by infections, which are assumed to be viral in many cases. Asthma attacks may be precipitated by food. For example, in small children, sensitivity to milk may stimulate an attack, and, in some adults, sensitivity to sulfite compounds found in some foods and wine may stimulate an attack. A subgroup of asthmatics are so sensitive to aspirin (acetylsalicylic acid) that ingestion of this chemical may lead to a life-threatening attack.

Answer:

No, not necessarily

Explanation:

Asthma isn't necessarily caused by a virus or a pathogen. It can be genetic or environmental, meaning that it can be passed down through family members, or it can result from an environmental factor, such as allergies or poor air quality.

Answer:

Most of the natural processes on earth involves the usage of water such as hydro-logical cycle, nutrient cycle, climate cycle etc. All these processes are very essential for the survival of life on earth and thus,  option A is correct

In phosysthesis , H+ ion and oxygen comes from the dissociation of H2O. while oxygen is released into the atmosphere, H+ get associated to form energy molecule like NADH etc. Thus,  option 3 is also correct

Blood contains 92% of water and thus it forms the main component of biological components. Thus,  option 4 is also correct

But as given in option 2 , all organic compounds have water only in there aqueous phase (solution). Therefore , option 2 is in correct

Explanation:

The importance of water includes the following:

Life need water. Its special features support many biological functions. First, water is a universal solvent, permitting chemical reactions and nutrient delivery in living organisms. Second, it facilitates metabolic reactions, ensuring biological activities. All organic compounds—carbohydrates, lipids, proteins, and nucleic acids—need water to function. It helps DNA and RNA transmit genetic information by forming their backbones.

Photosynthesis, which turns light into chemical energy, requires water. This process splits water, releasing oxygen into the atmosphere and combining hydrogen with carbon dioxide to make glucose, the main energy source for living things. Water makes up most biological substances, including blood, which transports nutrition, oxygen, and waste.

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Your question is incomplete but your full question was:

Identify the importance of water. Check all that

apply.

A neuron depolarizes when the Na+ channels open, and the ion flows into the cell. If you open an Na+ channel in a typical neuron, Na+ will enter the cell, and the cell will depolarize. Option A.

When the electrical stimulus is applied to the neuron or when a neurotransmitter joins its receptor, ion channels activate.

Ion channel openning produces depolarization by letting sodium get into the cell.

Depolarization, due to the increase of possitive charges, propagates to inactivated regions adjacent to the membrane opening more sodium channels.

Ions traffic will consist of the pass of sodium to the interior of the cell and potassium to the exterior.

The interchange results in an increase of positive charges in the interior of the cell. This depolarization activates an action potential that extends to the rest of the membrane.

So, when openning a Na+ channel in a typical neuron, Na+ will enter the cell, and the cell will depolarize. Option A is correct.

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Answer:

Have students mix water and cornstarch in a cup and then add iodine solution to it. The solution will turn a dark purple. This will show that iodine, when in the presence of starch, turns purple, the basis of the other two experiments.

Explanation:

By observing planetary transits, NASA has discovered thousands of exoplanets. The Kepler mission was created to investigate the variety and structure of exoplanetary systems.

The Kepler Mission is specifically designed to survey our region of the Milky Way galaxy in search of hundreds of Earth-size and smaller planets in or near the habitable zone, as well as to determine what fraction of our galaxy's hundreds of billions of stars may have such planets.

By observing planetary transits, NASA has discovered thousands of exoplanets. The Kepler mission was created to investigate the variety and structure of exoplanetary systems.

Thus, to investigate the variety and structure of exoplanetary systems, transits were being pursued by the Kepler Mission.

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Answer:

Isomers

Explanation:

Isomers. Isomers are compounds that contain the same number of atoms, i.e., they have the same empirical formula, but differ from each other by how the atoms are arranged. Examples of isomers with the formula C8H10 are ethyl benzene, m-xylene, p-xylene, and o-xylene.