1. Which statement about the function of cell parts is true? * Animal cells have a cell wall.
a .
Mitochondria is the powerhouse of the cell.
The nucleus is the protective, rigid, outer layer of the cell.
All of the above

Which organelle plays a role in intracellular digestion?

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.

If garbage is left on the street flies in microbes can arise from nothing to feed on it true or false