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Marina CMI [18]
3 years ago
6

Evolution is the process by which populations of organisms can change over time. How is directional selection related to evoluti

on?
Biology
1 answer:
9966 [12]3 years ago
6 0

Answer:

Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. It has been demonstrated many times in natural populations, using both observational and experimental approaches.

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What is the name for the measure of a drug's relative safety for use, computed by the ratio of the lethal dose for 50 percent of
ira [324]
It is called THERAPEUTIC INDEX. Therapeutic index is the comparison of the amount of a particular drug that causes the desired therapeutic effects and the amount that causes toxicity. The index can be low or high. A drug with a low therapeutic index will require only a small increase in dose to produce toxic effects in users. 
5 0
4 years ago
All living things contain carbon.which of the following statements is true about carbon atoms?
vfiekz [6]

I. Each carbon atom can form single bonds with up to four other carbon atoms. II. Each carbon atom can form double bonds with up to two other carbon atoms. III. Carbon atoms can join together to form chains or rings. IV. A single molecule of some compounds can contain thousands of carbon atoms.

Answer:

All the given choices

Explanation:

Carbon is a very interesting element which is the backbone of most organic compounds.

Organic compounds are made up of carbon. Carbon forms a wide range of compound due to the following properties;

  • An atom of carbon has 4 valence electrons and can bond with 4 other carbon.
  • Carbon can form single, double and triple covalent bonds.
  • They can join together to form rings or chains.
6 0
3 years ago
An enzyme that breaks DNA, dispels the tension, and reseals the strand ahead of a DNA replication growing fork is called a(n):
qaws [65]

Answer:

Topoisomerase

Explanation:

Topoisomerases are enzymes that produce changes in the topology of the DNA during replication, transcription, traduction, or reparation processes. They can cut one or both strands and in order to relieve torsional stresses in the supercoiled structure of DNA. With this, they help to maintain the chromosome's integrity. There are two types of topoisomerases: topoisomerase I (it cuts only one strand of DNA) and topoisomerase II (it is able to cut both strands of DNA).

4 0
3 years ago
Suppose that species A evolves and species B evolves in response to the changes in Species A. Species A then changes in response
Leviafan [203]

The process by which <em>two species evolve</em> as a <em>response</em> to <em>changes in one another over time</em> is called, "coevolution" thus the correct answer is that it is an example of <u><em>COEVOLUTION</em></u>

4 0
3 years ago
Which cellular process takes place in the ribosome that are bound to the endoplasmic reticulum
Novosadov [1.4K]
Actually no cellular process takes place IN the ribosomes. 
<span>But proteins are made ON the ribosomes. </span>

<span>And if it's the ribosomes associated with ER, then the proteins are going to be distributed to some other organelle in the cell or exported out of the cell.</span>
8 0
3 years ago
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