Chain-of-thought: Specialization occurs when competing species evolve different adaptations. Adaptation is the result of natural selection. Specialization is a result of natural selection.
Q: Natural selection results in:
Options:
- (A) insects
- (B) root growth
- (C) Plants growth
- (D) Animal survival
- (E) animals
- (F) Plant reproduction
- (G) mammals
- (H) specialization
A: (H)
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Chain-of-thought: Flowing water can slowly dissolve carbon in sedimentary rock. Limestone is a type of sedimentary rock. Flowing water can slowly dissolve carbon in limestone.
Q: Flowing water from a mountain can dissolve carbon in what kind of rock?
Options:
- (A) magma
- (B) loose soil
- (C) loose dirt
- (D) precipitation
- (E) pumice
- (F) limestone
- (G) wind and rain
- (H) andesite
A: (F)
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Chain-of-thought: Viruses contain DNA but not much else. DNA DNA is deoxyribonucleic acid. Viruses contain deoxyribonucleic acid, but not much else.

Q: What do viruses contain the most of?
Options:
- (A) Chemical energy
- (B) layers of fat
- (C) ribonucleic acid
- (D) cytoplasm
- (E) germs
- (F) harmful substances
- (G) deadly and devastating
- (H) deoxyribonucleic acid
A: (H)
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