Answer:
Ribosomes, Cell membrane
Explanation:
Ribosomes can be described as structures which are involved in the production of proteins. Ribosomes are hence known to be the protein manufacturing units of a cell. As enzymes are also proteins,they will be synthesized in the ribosomes.
Cell membrane can be described as the membrane which is present outside the cell or which separates the cell from the external environment.
For an enzyme to pass through the external environment, it will have to pass through the ribosomes and the cell membrane.
B. Exchanged during normal breathing
Cytokinesis occurs after telophase
Sexual reproduction plays an important role in variation such that; production of unique gametes during meiosis, and the random combination of male and female gametes upon fertilization provides a large amount of variation (option A).
<h3>What is sexual reproduction?</h3>
Sexual reproduction is the process whereby a new organism is created by combining the genetic material of two organisms.
During sexual reproduction, organisms produce gametes through a process called meiosis.
This meiosis allows genetic diversity in the unique gametes produced, which causes random combination of male and female gametes upon fertilization provides a large amount of variation.
Learn more about sexual reproduction at: brainly.com/question/7464705
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A base-pair substitution is a<span> type of mutation involving replacement or substitution of a single nucleotide base with another in DNA.</span>
