The main excretory product of frog is ?
[a] urea
[b] ammonia
[c] uric acid
[d] amino acid

Differentiation of cells changes the nucleic information. true false

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Which statement best describes how the nucleus, the rough endoplasmic reticulum, and ribosomes interact during protein synthesis?