What can make lungs more at risk for infection by streptococcus?
Options:
- (A) Allergies
- (B) bacteria
- (C) Pollution
- (D) injury
- (E) fungi
- (F) sweating
- (G) the skin
- (H) smoking
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Let's think first: Pneumonia may be caused by an infection or injury of the lungs. Streptococcal pneumonia is caused by the bacteria Streptococcus pneumoniae. Streptococcus can infect the lungs following injury.... So the answer is [(D)]

What has a nervous system?
Options:
- (A) animals
- (B) tortoises
- (C) crocodiles
- (D) sponges
- (E) elephants
- (F) placozoans
- (G) mesozoans
- (H) insects
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Let's think first: Most invertebrates have a nervous system. Insects are the most common invertebrates. Insects have a nervous system.... So the answer is [(H)]

Biomolecules are made in where?
Options:
- (A) Power plants
- (B) ribosomes
- (C) Earth
- (D) body water
- (E) loose dirt
- (F) ocean water
- (G) environment
- (H) loose soil
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Let's think first: Ribosomes are sites where proteins are made. Biomolecules covered include amino acids, proteins, enzymes, vitamins and hormones. Ribosomes are sites where biomolecules are made.... So the answer is [(B)]