input: OPTIONS:
- tissues
- sounds
- measurements
- environments Now, answer this question: Q: The enormous number of species is due to the tremendous variety of what? A:
A:
output: environments

Q: What do we call natural resources that are remade by natural processes as quickly as people use them? A:

OPTIONS:
- nonrenewable
- exotic
- geothermal
- renewable

Answer: renewable

Problem: OPTIONS:
- axon
- exon
- stop mutation
- stop codon
Q: Q: But a point mutation can also change a codon for an amino acid into a what? A:
Answer: stop codon

Problem:OPTIONS:
- nervous system
- digestive system
- Cardiovascular system
- skeletal system

Q: What system protects the soft organs of the body? A:
****
A: skeletal system

Q: What common code do all known living organisms use? A:
OPTIONS:
- biochemical
- Morse code
- code of ethics
- genetic
genetic

Q: What is the main function of blood? A:
OPTIONS:
- digestion
- respiration
- excretion of waste
- to transport

Answer:
to transport