BIOLOGY HIGH SCHOOL

Gene families, such as the globin family of genes in primates are the result of: deficiencies inversions simple translocations duplications

Answers

Answer 1
Answer: The answer is duplications.

Gene family consists of several similar genes. Duplications of single genes, exons, multigene families, or whole genome have given rise to families of related genes. The example is the globin family of genes in primates. About 500 million years ago, a duplication of single globin gene began. Much later, during primate evolution, the additional duplications occurred together with some point mutations. So the end result is diversity in globin chains that arose from original globin gene.

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Why is the understanding of classification an important life skill

Answers

so that you can be organized in your home or for school or work and you can categorize things to arrange them

Answer: so that you can be organized in your home or for school or work and you can categorize things to arrange them

Explanation:

Plant cells have _____ and _____, which are not present in animal cells.a. mitochondria, chloroplasts
b. cell membranes, cell walls
c. chloroplasts, nucleus
d. chloroplasts, cell walls

Answers

D. chloroplasts, and cell walls.

Chloroplasts are only uses by plants for photosynthesis.
Cell walls are not present In animal cells.

What is Epigeal Germination?

Answers

Epigeal germination is a botanical term indicating that the germination of a plant takes place above the ground. An example of a plant with epigeal germination is the common bean (Phaseolus vulgaris). The opposite of epigeal is hypogeal (underground germination).
Epigal germination means that the germination of the plant takes place above the ground.

Ken needs to measure out 50 mL of water. Which of the following is the best tool for Ken to use?A. spring scale
B. ruler
C. graduated cylinder

Answers

The correct answer is (c.) graduated cylinder. If Ken needs to measure out 50 mL of water which means the volume of the water, you may use graduated cylinder. A graduated cylinder is a measuring and mixing laboratory equipment for measuring the volume of a liquid.

Answer:

it is c graduated cylinder

Explanation:

got it right on stydy island :)

Investigators are studying a signaling pathway in which an RTK activates the monomeric GTPase Ras.a. True
b. False

Answers

False. Correct me if i’m wrong.

A wilted flower placed in a vase of water for several hours became stiff and stood erect. When it was placed in a salt solution, it wilted. From this information what can we say about the cells of the flower? A) the flower cells are hypertonic to fresh water but hypotonic to the salt solution. B) the flower cells are hypotonic to the fresh water and hypertonic to the salt solution.C) the flower cells are hypertonic to both the fresh water and the salt solution.D) the flower cells are isotonic to both the fresh and salt water solutions

Answers

Answer:

Option A

Explanation:

The flower cells are hypertonic to fresh water but hypotonic to the salt solution.

Flower cell is hypertonic to fresh water, this means that the amount of solute in the solution outside the flower cell is higher than the solute content inside the flower cell.

While when a flower cell is hypotonic, it means that the amount of solute in the solution outside the flower cell is lower than the solute content inside the flower cell.

This is the reason why a flower plant placed in vase of water stood and become erect, while the same flower placed in a salt solution wilted.

Hence, option A is correct

Final answer:

The flower cells behave as hypertonic in fresh water, causing them to absorb water and stand erect, while they act as hypotonic in a salt solution, leading to water leaving the cells and wilting the flower.

Explanation:

From the information given about the flower's cells, the correct answer is A) the flower cells are hypertonic to fresh water but hypotonic to the salt solution. This is due to the process of osmosis, which is the movement of water across a semi-permeable membrane, like a cell wall, from areas of low solute concentration (hypotonic) to areas of high solute concentration (hypertonic).

When the wilted flower was placed in the fresh water, the cells were hypertonic causing water to enter the cells and making the flower stand erect. This is because there were more solutes inside the cells than the fresh water solution surrounding them.

On the other hand, when the flower was placed in the salt solution, it wilted because the cells were hypotonic compared to the hypertonic salt solution. There were fewer solutes in the flower cells than the salt solution outside, so water left the cells, which made the flower wilt.

Learn more about Osmosis here:

brainly.com/question/31028904

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