Answer: One way of creating a variation in a population is through genetic replication errors. This will make a new type of alleles. Environmental factors cause variation such as affecting enzyme activity and function. The changes would show in the phenotype of an organism.
Explanation: thus is one way ik for sure another way idk srry
Histamine is released when a cell come across an antigen
The skeletal system is the bony is the bony frame that support all the organs of the body. The skeletal structure that encloses the reproductive organs is the pelvis.
D. A swimmer getting ready to dive into a pool
The function of the vascular tissue is to A transfer