input: OPTIONS:
- to locate mates
- to sleep
- to reproduce
- to locate prey Now, answer this question: Q: Why do sharks sense low levels of electricity? A:
A:
output: to locate prey

Q: What serves as the control center of the nervous system? A:

OPTIONS:
- spine
- bone
- heart
- brain

Answer: brain

Problem: OPTIONS:
- alternating
- thermal
- magnetic
- kinetic
Q: Q: Which energy is momentarily stored in tendons after each leap provides a boost for the next leap? A:
Answer: kinetic

Problem:OPTIONS:
- steroids
- estrogen
- androgen
- testosterone

Q: During adulthood, what is needed for the production of sperm? A:
****
A: testosterone

Q: B cells and t cells are examples of what type of cells? A:
OPTIONS:
- heart cells
- cancer cells
- skin cells
- white blood cells
white blood cells

Q: What are the two possible reduction products for brf3? A:
OPTIONS:
- brg and brf
- brf2 and brf4
- brf and brf4
- brf and br2

Answer:
brf and br2