What type of fossils are a cast or mold in a rock?
a. cast fossils
b. mold fossils
c. impression fossils
d. impact fossils

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

How does natural selection change thephenotypes within a population over time?