Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.
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Answer:
A source from which organisms generally take elements is called exchange pool (option B).
Explanation:
Options for this question are:
- <em>Food web.</em>
- <em>Exchange pool.</em>
- <em>Reservoir.</em>
- <em>Biotic community.</em>
The term exchange pool is related to the biogeochemical cycles that exist in nature, referring to the source from which elements present in the environment become part of living organisms.
<u>Exchange pools are the biotic components</u> -like animals and plants- of an ecosystem, which determine the passage of elements between living beings. An element can remain as a reservoir (abiotic) in the soil, and then be incorporated into the exchange pool.
When salt and sugar dissolve in water it is a physical change. The chemical makeup of the salt and sugar are not changed.
Physical change
The anticodons on tRNA are the ones that pair with codons on mRNA during translation.
<h3>Translation</h3>
It is also known as protein synthesis.
During this process, the genetic codes on mRNA, otherwise known as codons, pair with their complementary anticodons on tRNA to release the respective amino acid.
The amino acids are linked together by peptide bonds to give the primary structure of proteins.
More on translation can be found here: brainly.com/question/17485121
<span>The sum total of all the chemical reactions that occur in organisms is called-</span>Metabolism
