Question: Fact 1: Harming an animal species causes that animal 's population to decrease. Fact 2: If mortality is greater, then the population decreases. Given the two facts above, what can cause a population decline?
OPTIONS:
- wind
- magma
- bacteria
- influenza
- mortality
- a pathogens
- reproduction
- parasites
Answer: mortality

Question: Fact 1: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Fact 2: Sexual reproduction requires formation of gametes, followed by fertilization. Given the two facts above, what involves a sperm and egg fusing to form a diploid zygote?
OPTIONS:
- Leptospirosis
- produce offspring
- allow growth
- sexual reproduction
- metabolic reaction
- peachleaf willow
- rapid expansion
- Plant reproduction
Answer: sexual reproduction

Question: Fact 1: Arthropods have a life cycle with sexual reproduction. Fact 2: An ant and a lobster are both arthropods. Given the two facts above, what have a life cycle with sexual reproduction?
OPTIONS:
- insects
- graptolites
- minerals
- bacteria
- barnacles
- lobsters
- animals
- fungus
Answer:
lobsters