Problem: OPTIONS:
- limbic system
- nervous system
- metabolism system
- circulatory system
Q: Q: Sickle-cell disease significantly impairs the function of what? A:
Answer: circulatory system

Problem:OPTIONS:
- photons
- chloroplasts
- electrons
- photoreceptors

Q: Behind the pupil, a single lens focuses light on a layer of what? A:
****
A: photoreceptors

Q: What is any nonmetallic, inorganic solid that is strong enough for use in structural applications called? A:
OPTIONS:
- tissue
- metallic
- glass
- ceramic
ceramic

Q: Most of the chemical reactions in the body are facilitated by what? A:
OPTIONS:
- proteins
- vitamins
- carbohydrates
- enzymes

Answer: enzymes

Question: Q: Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called what? A:
OPTIONS:
- internal reproduction
- spawning
- schooling
- mouth brooding
Answer: mouth brooding

input: OPTIONS:
- deformities
- problems
- diseases
- disorders Now, answer this question: Q: Having extra chromosomes or damaged chromosomes can cause what? A:
A:
output:
disorders