Answer:
D- crossing over
Explanation:
All the others happen in mitosis.
I would say that this would be 2. Breaks down existing landforms to create new ones
Answer:
A. The magma cooled too quickly too quickly for gas to escape.
Explanation:
Scoria is a type of extrusive igneous rock. Some of their characteristics include that they cool quickly with no time for large crystals to form, some of them have large vesicles which are holes caused by gas bubbles when the lava was molten.
Atoms, molecules, cell membranes, then cell (in order from smallest to biggest).
