Half of the polar bears in a small population die. This population may experience changes due to _____. gene flow mutation genetic drift natural selection

Answers

Answer 1

Answer:

Correct answer: Genetic Drift

Genetic drift is defined as the random change in the allele frequency of a population is changed by chance or due to random changes in the environment. It is a random process that can lead to large changes in the overall population in a short period of time. It is a mechanism of evolution and it does produce the adaptation.

Hence, the correct answer would be genetic drift.

Answer 2

Answer:

Answer:

Genetic Drift

Explanation:

Genetic drift refers to the evolutionary agent that brings about the changes in the gene pool of the population by some chance event. In the given example, half of the polar bear population was wiped out of the habitat by any chance event such as natural calamity, epidemic disease or any other random events. Since no mutation or natural selection was responsible for the death of polar bears, it is an example of genetic drift.

Genetic drift is more effective in small populations. And the size of the population of the polar bear was also small to allow the genetic drift to cause the changes.

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Digestion happens in the stomach and ________, before it goes on to the large intestine.

Answers

Answer:

Small Intestine

Explanation:

The broke down food that was turned into mush is further processed my the small Intestine getting even more nutrients out of the food you ate.

4. Compare and contrast the structure and function of a compound light microscope and a dissecting microscope. Be sure to discuss when each would be more useful than the other.

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Compound MicroscopeCompound microscope is commonly used in the schools and colleges.It comes under the category of microscopes used in biology.It has two lenses namely the objective lens and the ocular lens.It provides a magnification of 1500X.Eyepiece lens is of 10X or 15X power.It is used to observe bacterial, protozoa, various cells, etc.

Answer:

Explanation:

Both are light microscopes, but the compound light microscope has a higher magnification than the dissecting microscope.

Which of these proteins in mammals show only primary and secondary structures?Oxytocin
Keratin
Hemoglobin

Answers

The correct answer is keratin. Proteins like keratin are made up of multiple peptide chains (polypeptide); these are group of amino acids joined by peptide bonds. The sequence of amino acids in a protein is the primary structure while the specific shape in which it is folded (alpha or beta) is called the secondary structure.

______________ can be used to date fossils in rocks to give an approximate age.

Answers

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Explanation;

Radiocarbon dating is a technique for defining the age of an object involving organic material by using the properties of radiocarbon, a radioactive isotope of carbon.c material through using the properties of radiocarbon, a radioactive isotope of carbon. The development of radiocarbon dating has had an intense influence on archaeology

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Explanation;

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Unique to primary growth is the fact that it

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lengthens the height of the stems.The vascular cambium produces secondary phloem and xylem tissue.Vascular cambium, a plant tissue located between the xylem and the phloem in the stem of a vascular plant. It is also the source of both secondary xylem growth and the secondary phloem growth. Vascular cambium is usually found on dicots and gymnosperms not on monocots which usually lack secondary growth. It does not transport water, dissolved food or minerals by plants.Vascular cambia are cylinders of unspecialized meristem cells which divide to make new cells which specialize to form secondary vascular tissues.

Which part of the root allows it to grow deep inside the soil in search of water?

Answers

The correct answer is root tip. The root tip is the part of the root that allows it to grow deep into the soil in search of water. The gravity is the force that allows the root tip to keep pushing in order for it to grow inside the soil.

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