Problem:OPTIONS:
- muscular
- digestion
- endocrine
- immune

Q: Aids is an infectious disease of which system? A:
****
A: immune

Q: What evolutionary concept characterizes a species by body shape and other structural features? A:
OPTIONS:
- geologic species concept
- spontaneous evolution theory
- primary speciation
- morphological species concept
morphological species concept

Q: What is a close relationship between two species in which at least one species benefits called? A:
OPTIONS:
- parasitic
- morphogenesis
- competition
- symbiosis

Answer: symbiosis

Question: Q: Amines are weak bases due to the presence of a lone pair of what on the nitrogen atom? A:
OPTIONS:
- protons
- nuclei
- atoms
- electrons
Answer: electrons

input with options: Q: Which metal is not solid at room temperature? A:
OPTIONS:
- silver
- aluminum
- titanium
- mercury
output: mercury

Problem: OPTIONS:
- diffusion
- diffusion
- shrinking
- contraction
Q: Q: Shortening of muscle fibers is called what?' A:
Answer:
contraction