From what structure does a pollen grain devel C. endosperm
B. embryo
D. microspore
A. egg

Which macromolecules are polymers made of nucleotides (a) fatty acids (b) nucleic acids (c) carboxylic acids (d) amino acides

When plants use sunlight to make food, the energy of sunlight is

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success