Problem:OPTIONS:
- rotational cliffs
- horizontal cliffs
- diagonal cliffs
- vertical cliffs

Q: What do loess deposits form? A:
****
A: vertical cliffs

Problem:OPTIONS:
- carbon
- short filaments
- short particles
- short microtubules

Q: What are centrioles made from? A:
****
A: short microtubules

Problem:OPTIONS:
- sunlight
- sucrose
- carbon dioxide
- food

Q: What do animals require to grow and develop? A:
****
A: food

Problem:OPTIONS:
- Amphibians
- Birds
- Mammals
- tetrapods

Q: Vertebrates with four limbs are also called what? A:
****
A:
tetrapods