I had to look for the missing options so here is my answer:
A receptor protein is a kind of intracellular protein which activates its function when it receives signals from outside of the cell. One of the responses it does is some changes in the tissues. Receptor proteins possess multiple functions inside the cell, and the one that is not included is <span>preventing cytoplasmic reconstitution. </span>
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
Central nervous system. and automatically nervous system .it is mainly spinal cord system of the body.
The spines of the cactus have several functions, which are the following:
To defend them from possible predators: inside the body of the plants there is a great deal of water; if herbivores could access it, these plants would not survive.
To provide them with shade: it is true that not much, but it is enough so that the loss of water by evaporation is minimal.
Reflect sunlight: many species have white spines.
