Courtship is a behavior that animals use to attract what?
Options:
- (A) a pollinator
- (B) a partner
- (C) animals
- (D) a child
- (E) honeybees
- (F) humans
- (G) reproduce
- (H) a host
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Let's think first: Courtship is behavior that is intended to attract a mate. Mating Ducks usually look for a mate or partner in winter. Courtship is behavior that is intended to attract a partner.... So the answer is [(B)]

What species of female mammal lacks a uterus and vagina?
Options:
- (A) fallopian tubes
- (B) echidna
- (C) live birth
- (D) lays eggs
- (E) cows
- (F) tortoises
- (G) alpacas
- (H) goats
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Let's think first: Female monotremes lack a uterus and vagina. Examples of monotremes are the Platypus and Echidna. Platypus and echidna lack a uterus and vagina.... So the answer is [(B)]

What don't arthropods have?
Options:
- (A) an exoskeleton
- (B) legs
- (C) Bodily water
- (D) Damaged hearing
- (E) kinetic energy
- (F) a backbone
- (G) Energy
- (H) backs
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Let's think first: Arthropods are the largest phylum of invertebrates. Invertebrates are animals without a backbone. Arthropods are animals without a backbone.... So the answer is [(F)]

Most ecosystems get energy from what in the atmosphere?
Options:
- (A) fires
- (B) Sun
- (C) wind
- (D) summer
- (E) oxygen
- (F) Light
- (G) heat
- (H) H20
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Let's think first: Most ecosystems get energy from sunlight. On Earth, energy from sunlight heats the atmosphere more at the equator than at the poles. Most ecosystems get energy from heat in the atmosphere.... So the answer is [(G)]

What lack respiratory and excretory systems?
Options:
- (A) They may not survive.
- (B) members of their own species
- (C) platypus
- (D) humans
- (E) crinoids and blastoids
- (F) passenger pigeons
- (G) graptolites
- (H) whales
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Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms in the diorama include the crinoids and blastoids. Crinoids and blastoids lack respiratory and excretory systems.... So the answer is [(E)]

Specialization occurs when competing groups of interbreeding individuals evolve different what?
Options:
- (A) color of leaves
- (B) fur and fat
- (C) forces
- (D) colors
- (E) frontal zones
- (F) graptolites
- (G) sensory neurons
- (H) adaptations
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Let's think first: Specialization occurs when competing species evolve different adaptations. Species is a group of interbreeding individuals. Specialization occurs when competing groups of interbreeding individuals evolve different adaptations.... So the answer is [(H)]