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
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Let's think first: Specialization occurs when competing species evolve different adaptations. Adaptation is the result of natural selection. Specialization is a result of natural selection.... So the answer is [(H)]

How do some insects communicate?
Options:
- (A) sound
- (B) sensory neurons
- (C) Decibels
- (D) electronic waves
- (E) progesterone
- (F) Vibrates
- (G) pheromones
- (H) radio waves
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Let's think first: Ants communicate with chemicals called pheromones. Ants are of extreme importance in the insect world. Some insects communicate with chemicals called pheromones.... So the answer is [(G)]

Why does vesicle transport need energy?
Options:
- (A) it helps plants in growing
- (B) to prevent movement
- (C) for movement of substances
- (D) during the day
- (E) Transfers energy
- (F) flow of electrons
- (G) to breath
- (H) magnetism
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Let's think first: Vesicle transport requires energy, so it is also a form of active transport. Active transport involves movement of substances against a chemical gradient. Vesicle transport requires energy for movement of substances against a chemical gradient.... So the answer is [(C)]

Which of the following uses energy that comes from body heat?
Options:
- (A) kinetic energy
- (B) evaporation of perspiration
- (C) kinetic friction
- (D) evaporation of snow
- (E) Transfers energy
- (F) a rock rolling down a hill
- (G) a fire burning near a campsite
- (H) converting mass to energy
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Let's think first: Evaporation of sweat uses energy, and the energy comes from body heat. Diaphoresis is a fancy medical term for perspiration or sweating. Evaporation of perspiration uses energy and the energy comes from body heat.... So the answer is [(B)]

Nematodes reproduce how?
Options:
- (A) root growth
- (B) heat or cold
- (C) pollen
- (D) electrically
- (E) sexually
- (F) seeds
- (G) survive
- (H) a cuticle
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Let's think first: Roundworms reproduce sexually. Nematodes are millimeter-sized roundworms. Nematodes reproduce sexually.... So the answer is [(E)]

What can be found in moist soil near rivers and streams in tropical regions?
Options:
- (A) storing water
- (B) a fish
- (C) insects
- (D) Most plants
- (E) shrub beds
- (F) bioaerosols
- (G) ferns
- (H) reptilians
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Let's think first: Caecilians can be found in moist soil near rivers and streams in tropical regions. Salamanders, frogs, toads, caecilians Class Reptilia. Reptilians can be found in moist soil near rivers and streams in tropical regions.... So the answer is [(H)]