Q: Q: The mature pollen grain is composed of two cells: the pollen tube cell and which other cell? A:

OPTIONS:
- ova
- glial cell
- photosynthesis cell
- generative cell

A: generative cell

input: OPTIONS:
- a bio reaction
- spontaneous mutation
- cellular respiration
- a chemical reaction Now, answer this question: Q: What is a process that changes some chemical substances into other chemical substances? A:
A:
output: a chemical reaction

Q: What do cells do in order to replace damaged or worn out cells? A:

OPTIONS:
- replicate
- die
- fold
- divide

Answer: divide

Problem: OPTIONS:
- renewable
- recurring
- reusable
- nonrenewable
Q: Q: Fossil fuels and nuclear power are what type of resource? A:
Answer: nonrenewable

Problem:OPTIONS:
- covalence
- ionic bonds
- electromagnetism
- chemical behavior

Q: In an atom, what is determined by electron distribution in shells? A:
****
A: chemical behavior

Problem:OPTIONS:
- embryo sac
- neural sac
- algae sac
- yolk sac

Q: On the ventral side of the embryonic disc, opposite the amnion, cells in the lower layer of the embryonic disk (the hypoblast) extend into the blastocyst cavity and form this? A:
****
A:
yolk sac