Your immune system consists of that fight disease.
a. cells
c. organs
b. tissues
d. all of the above

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

What is used to keep track of the gamates and possible offsprings combination

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca