DNA sequences that cap chromosomes, known as ______, become shorter and shorter each time a cell divides; and after about 70 or 80 such divisions, they are dramatically reduced, and the cell can no longer reproduce.

#1

#2

CO_2 will form carbonic acid which is acidic in nature

#3

PH stands for potential of Hydrogen .

Explanation:

Acidification reduces the availability of carbonate ions in ocean water, which provide the building blocks these organisms need to make their shells and skeletons, significantly reducing the chances for their offspring to survive.

when carbon dioxide is dissolved in water, the release of hydrogen ions in carbonic acid is what lowers the pH. As CO2 levels increase around Earth, the amount of dissolved CO2 also increases, which increases the amount of carbonic acid, therefore decreasing the pH.

pH stands for "power of hydrogen." The "H" is capitalized because it is the hydrogen element symbol. pH is a measure of how acidic or basic an aqueous solution is. It is calculated as the negative logarithm of hydrogen ion concentration.

Answer:

He placed light and dark moths on tree trunks where he could observe them and then he recorded the times a bird found the moth.  

Explanation:

How did Kettlewell determine if moths lived longer than others? By monitoring the amount of dark and light-colored moths on the light and dark trees and seeing how many were caught by birds

Kettlewell determines if moths lived longer than others through the fact that it considerably analyzes the amount of dark and light-colored moths on the light and dark trees and observes the number of many that were caught by birds.

Dr. Kettlewell test his hypothesis of the evolutionary mechanism of industrial melanism, he directly studied bird predation on moths. Kettlewell placed light and dark moths on the trunks of trees from where they can be observed. Then the number of times a bird found the moth on the tree trunk was calculated.

According to the question, he recorded the times a bird found the moth. He found that on dark tree trunks, birds were twice as likely to eat a light moth as a dark moth. The same birds would find the dark moth twice as often if the bark on the tree was light.

This supported the idea that dark moths had a survival advantage in a dark forest. He placed light and dark moths on tree trunks where he could observe them and then he recorded the times a bird found the moth at a given place.

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Glycolysis results in the production of two pyruvate molecules from a single molecule of glucose. In the absence of oxygen, the end product of glycolysis is lactate.

Glycolysis is a biological process that involves the cellular degradation of the simple sugar glucose to yield pyruvate, and ATP as an energy source.

Glycolysis occurs in the cytoplasm of living cells and results in the formation of two ATP molecules.

Glycolysis in the absence of oxygen results in a fermentation process that produces lactate.

Therefore, glycolysis results in the production of two pyruvate molecules from a single molecule of glucose. In the absence of oxygen, the end product of glycolysis is lactate.

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Answer:

a shaded square

Explanation:

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In a pedigree, an affected male would be designated by a shaded square. The correct answer is option 3.

A pedigree is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors from one generation to the next.

In a pedigree, an affected male would be designated by a shaded square. This is because squares represent males in a pedigree, and shading indicates that the individual is affected by the trait being studied. In contrast, an open square would represent an unaffected male. Similarly, a shaded circle would represent an affected female, while an open circle would represent an unaffected female.

Therefore, a pedigree would show a shaded square for an affected man. Option 3 is the right answer.

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The given question is incomplete. The complete question is:

In a pedigree, an affected male would be designated by Multiple Choice

1.an open square.

2.an open circle.

3.a shaded square

4.a square with a line through it.

5.a shaded circle

The exocrine pancreas is involved with the secretion of digestive enzymes into the other gastrointestinal tract. It is composed of pancreatic acini. Thus, option c is correct.

An exocrine pancreas is the part of the pancreas that differs from the endocrine pancreas in cell structure and function. The exocrine pancreas is involved in the release of digestive ions.

The exocrine pancreas is composed of acini, while the endocrine is made of islets of Langerhans. The acinar cells of the exocrine are responsible for the transportation of the enzymes.

Therefore, the exocrine pancreas is made of acini.

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The complete question is attached to the image below.

Answer:

Migratory birds are particularly susceptible to adverse effects of human activities.

Explanation:

Because the global networks of ecosystems on which birds rely are undergoing rapid change.

hope this helps

pls mark braainliest

We find that the ecology of blackcaps in a recently colonized high-latitude wintering area is shaped by human activity, including supplemental bird feeding, and mediated by environmental conditions.

Answer:

The external skeleton of arthropods is a highly efficient system for small animals. The exoskeleton provides a large surface area for the attachment of muscles and, in addition to functioning in support and movement, also provides protection from the external environment.

Explanation:

Good Night fam

Answer:

b - Secrete enzymes and bile.

The pancreas secretes digestive enzymes into the small intestine, these enzymes are crucial for the digestion of proteins and polysaccharides. The liver secretes bile into the small intestine, which is necessary for the absorption of dietary fats.

Answer:

The structural cells of the nervous system are called neurons.

Also, there are two main cell types; such as neurons and neuroglia.

Explanation:

Answer:

A,B,C, and D

Explanation:

Forms of tropism include phototropism (response to light), geotropism(response to gravity), chemotropism (response to particular substances), hydrotropism (response to water), thigmotropism (response to mechanical stimulation), traumatotropism (response to wound lesion), and galvanotropism, or electrotropism (response to electric current).

I really hope that’s correct :)

Answer:

Eat a high-fiber diet.

Explanation:

One of the best ways to improve your digestive health is by maintaining a diet that is high in fiber and rich in fruits, vegetables, legumes and whole grains. This keeps the normal process of digestion running smoothly, helping to prevent constipation and maintain a healthy weight.

DNA polymerase always moves from the 5' to 3' direction along the strand, resulting in DNA replication being continuous on one strand and discontinuous on the other.

Hope this helps!

Answer:

A negative charge exists because of the electronegativity of oxygen. A polar water molecule is made up of hydrogen and oxygen. Due to its atomic structure, there is an unequal distribution of charges and thus oxygen gets a more negative charge while hydrogen gets a positive charge.

Explanation:

Answer:I feel like

It’s the last one it’s make more sense to me

Explanation:

or a

Answer:

Your answer is allopatric speciation.

Explanation:

Allopatric speciation is speciation that occurs when biological populations of the same species become isolated due to geographical changes such as mountain building or social changes such as emigration. Hope this helped :)

Answer:

Coronary artery disease can reduce blood flow to the heart and cause coronary artery disease

Explanation:

The build up of plaque leads to reduced blood flow causing chest pains, shortness of breath and other symptoms related to coronary artery disease. A complete blockage of the arteries can lead to a heart attack.

Answer:

collision

Explanation:

The Himalayan mountain range and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and continues today.

Answer: (A) Burying of solid waste

Explanation: took the test!

when the genes are independent, then one gene has no effect on the others inheritance, if they are linked, they are likely to be inherited together, so when you get one, you get the other as well. i hope this helped n srry if im late

Answer:

Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. Some intracellular organelles, such the nucleus and mitochondria, are enclosed by membranes that separate them from the cytoplasm. A Cell in biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell. The basic unit of a living organism.

Answer:

The Coriolis effect is what causes the rotation of a hurricane :))

Answer:

The amount of water given to the plants depends on the effect of how tall the plant can overall grow. For instance, if all twenty identical plants are being given the same amount of water, then they will grow all at equal rates. However, if there is not equal amount/consistency with the amount of water the plants receive, then this factor may contribute to an uneven growth pattern between all twenty plants. However, other factors (such as location, sunlight, etc.) may also contribute to a plant's growth.

Answer:

Genetic diversity may better adapt a population to inevitable changes in the environment.

Answer: G-protein molecules associated with the adrenergic receptor.

Explanation:When the signaling molecule binds the receptor it changes the receptor protein in some way.

Answer:

Frequency.

Explanation:

The frequency of an allele, or genotype, referes to it's prevelance within the population.