Q: Q: Channel proteins and carrier proteins help substances diffuse across what? A: | OPTIONS:
- endoplasmic reticulum
- ribosomes
- cytoplasm
- cell membrane
A: cell membrane

Q: Q: Pinocytosis or "cellular drinking," occurs when the plasma membrane folds inward to form a channel allowing dissolved substances to enter what? A: | OPTIONS:
- proteins
- nucleus
- homeostasis
- cell
A: cell

Q: Q: Scientists who find and study fossils are called what? A: | OPTIONS:
- biologists
- geologists
- anthropologist
- paleontologists
A: paleontologists

Q: Q: What causes genetic disorders? A: | OPTIONS:
- parasites
- proteins
- pollution
- mutations
A: mutations