Q: Q: What is the primary cause of air movement in the troposphere? A:

OPTIONS:
- solar winds
- asteroids
- the ozone layer
- differences in heating

A: differences in heating

input: OPTIONS:
- nose system signals
- skeletal system signals
- heart system signals
- nervous system signals Now, answer this question: Q: Many of the hormones are secreted in response to what signals of the body? A:
A:
output: nervous system signals

Q: What is the most familiar fibrous protein found in your body? A:

OPTIONS:
- cellulose
- Actin
- Collagen
- keratin

Answer: keratin

Problem: OPTIONS:
- nest
- tree
- gullet
- crop
Q: Q: Where do birds store and moisten food that is waiting to be digested? A:
Answer: crop

Problem:OPTIONS:
- cell tube
- occular tube
- peripheral tube
- neural tube

Q: The neural plate undergoes a series of cell movements where it rolls up and forms a tube called what? A:
****
A: neural tube

Problem:OPTIONS:
- the atlantic ocean
- eastern aisa
- northern africa
- southern asia

Q: Where does the most important monsoon in the world occur? A:
****
A:
southern asia