input: OPTIONS:
- their habitat
- predators
- competition and chaos
- the external environment Now, answer this question: Q: Cells must also be able to separate their relatively stable interior from what? A:
A:
output: the external environment

Q: Which plants sometimes colonize areas by disrupting interactions between native organisms? A:

OPTIONS:
- carnivorous exotic plants
- denser exotic plants
- bacteria exotic plants
- invasive exotic plants

Answer: invasive exotic plants

Problem: OPTIONS:
- neuron
- mucus
- cerebellum
- cytoplasm
Q: Q: Bacterial dna is contained in one circular chromosome, located where? A:
Answer: cytoplasm

Problem:OPTIONS:
- microvilli
- tentacles
- sporangia
- flagella

Q: What are the long, thin structures that protrude from the cell membrane and help single-celled organisms move or swim towards food? A:
****
A: flagella

Q: How do planets usually rotate to their orbital planes? A:
OPTIONS:
- exactly perpendicular
- chaotic
- randomly
- nearly perpendicular
nearly perpendicular

Q: What do decomposers release when they break down dead organisms? A:
OPTIONS:
- methane
- carbon dioxide
- acids
- nutrients

Answer:
nutrients