Match the stages with the right definition

Which element provides strength to the exoskeleton of clams and oysters

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed