What is a form of vesicle transport that requires energy?
Options:
- (A) absorption
- (B) glucose
- (C) Leptospirosis
- (D) a solute
- (E) Energy.
- (F) bioaerosols
- (G) direct energy
- (H) heat or cold
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Let's think first: Vesicle transport requires energy, so it is also a form of active transport. Absorption comes from active transport. Absorption is a form of vesicle transport that requires energy.... So the answer is [(A)]

What animals belong to the largest phylum of invertibrates?
Options:
- (A) plants
- (B) parasites
- (C) octopuses
- (D) tortoises
- (E) eartworms
- (F) insects
- (G) mammals
- (H) animals
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Let's think first: Arthropods are the largest phylum of invertebrates. Insects are the largest group of arthropods. Insects belong to the largest phylum of invertibrates.... So the answer is [(F)]

There are what who study how animals behave in their natural environment.
Options:
- (A) infants
- (B) heat or cold
- (C) insects
- (D) sensory neurons
- (E) scientists
- (F) people
- (G) humans
- (H) reptiles
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Let's think first: Ethologists usually study how animals behave in their natural environment. Ethologists are scientists who study animals in their natural habitats. There are scientists who study how animals behave in their natural environment.... So the answer is [(E)]

What have varied life cycles?
Options:
- (A) bacteria
- (B) fungi
- (C) Variety.
- (D) Cycles.
- (E) plants
- (F) Plants.
- (G) insects
- (H) Life of air.
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Let's think first: Algae have varied life cycles. Some, such as the green algae, are plants. Some plants have varied life cycles.... So the answer is [(F)]

Why can amphibians easily absorb toxins?
Options:
- (A) salamanders
- (B) permeable skin
- (C) hydrate their cells
- (D) it needs them
- (E) poisonous frogs
- (F) Pesticides
- (G) cold blooded
- (H) bending light rays
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Let's think first: Amphibians have permeable skin that easily absorbs substances from the environment. Natural Toxins Toxins are poisonous substances from bacterias, plants or animals. Amphibians have permeable skin that can easily absorb toxins from bacterias, plants or animals.... So the answer is [(B)]

Changing in animals occurs by a process called what?
Options:
- (A) world climate change
- (B) It helps them survive
- (C) natural selection
- (D) Leptospirosis
- (E) ozone
- (F) relocation
- (G) permineralization
- (H) animal growth
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Let's think first: Evolution occurs by a process called natural selection. Actually, evolution is adaptation to change. Changing occurs by a process called natural selection.... So the answer is [(C)]