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3 years ago

Which of these sentences describe sources and preservation of genetic variation? Select all that apply.

Biology

1 answer:

madam [21]3 years ago

4 0

The correct sentences are the following:

A) Antibiotic resistance in bacterial populations is caused by natural selection of bacteria that inherit mutations that make them resistant to the antibiotics.

C) Crossing-over causes a shuffling of allele combinations during meiosis as the alleles from each parent form new combinations on homologous chromosomes.

E) When two bacteria are linked during conjugation, the donor cell passes DNA to the recipient cell which causes genetic recombination.

Explanation:

These three options are associated with the generation and preservation of genetic diversity

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Please someone help me and yes it can be more then one answer but give me your best answer

Strike441 [17]

Answer:

????

Explanation:

None of those seem to be correct to me.

1. Observations are made using the five senses- sight, sound, touch, taste, and smell. So this is invalid.

2. Observations and experiments can both be done anywhere

3. See answer to 2

4. It's cut off? But observations can literally be as simple as looking at a stick and noting that it's brown, so from what I can read, it's invalid.

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3 years ago

Weather forecasts are more accurate today than in the past due to

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3 years ago

Imagine that you are studying the food preferences of a lizard species across its range. You have hypothesized that because thes

vfiekz [6]

Answer: Option A

Explanation:

The hypothesis states that the lizards living in different regions belong to the different food preferences.

No, the hypothesis will be proved correct only when the lizards will be kept in the same condition then their food preferences will be studied.

If their food preference will still be the same then it can be concluded that they reflect parental food preferences.

Else, if they will feed on the food given to them then the hypothesis will be rejected.

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2 years ago

Over the course of a yoar, areas near Earth's equator receive more direct energy from the Sun than areas near Earth's polos. Whi

nika2105 [10]

Answer: number 2

Explanation:

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2 years ago

Which of the following is a true statement?Anabolic pathways build molecules, require energy, and are endergonic.Anabolic pathwa

expeople1 [14]

Answer:

A: Anabolic pathways build molecules, require energy and are endergonic

Explanation:

Anabolism and catabolism are the two important process of metabolism - a process through which cells get energy to drive various processes within the body and get rid of toxic wastes.

Anabolic and catabolic reactions can be described as opposing sides of the same coin. While anabolism refers to the various reactions that build up molecules within the cell, catabolism has to do with the breakdown of big or complex molecules into smaller ones.

Both processes involves energy. Anabolic reactions require energy to drive the building up process and therefore referred to as endergonic reactions. On the other hand, catabolic reactions liberate energy during the breaking down of complex molecules and therefore referred to exergonic reactions.

A good example of anabolic reaction is photosynthesis which involves the building up of carbohydrate (glucose) using carbon-dioxide, water molecule and energy while a good example of catabolic reaction is respiration which involves the breakdown of carbohydrates into carbon-dioxide, water molecules and the release of energy.

Hence, the only correct option is A.

6 0

3 years ago