1. a mushroom growing around a tree trunk is an example of what
a. phototropism
b. photoperiodism
c. geotropism
d. thigmotropism
2. where do carbohydrates, lipids, and proteins come from?
a. the food organisms eat
b. dead, decaying matter
c. dna in a cell's nucleus
d. the process of photosynthesis
3. a group of molecules that includes fats, oils, and waxes, and is an essential part of cell membranes and energy storage, is called what?
a. nutrients
b. proteins
c. lipids
d. enzymes