I think it is c because of organs would be classified as an organ system<span />
TRUE, Epithelial cells are avascular, they have not blood vessels. The only way your "true" outer skin can get nourishment is by diffusion / osmosis from connective tissue just below it. The observable part of your skin is actually dead. Among other reasons, it is too far from the vascular connective tissue to diffuse it's nourishment.
Answer:
A factor that is purposely left the same.
Explanation:
A controlled variable should not be changed throughout an experiment or else it will affect the outcome of each individual trial.
Answer:
The fossil record, however, is quite incomplete. Here's one major reason why: Sediment has to cover an organism's remains in order for the long fossilization process to begin. Most organisms decompose before this can happen.
Answer:
A. DNA creating mRNA which is used to make a polypeptide
Explanation:
Protein synthesis process involves the DNA creating mRNA, which is used to make a polypeptide.
