Which Animal Can Survive Being Frozen Solid?
An 8-question multiple-choice quiz exploring animals that tolerate whole-body freezing, how they do it, and common misconceptions.
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Quiz Questions & Answers
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Question 1: Which small vertebrate is famous for surviving whole-body freezing during winter?
Green tree frog
Bullfrog
Wood frog
Poison dart frog
Question 2: What primary physiological strategy allows some animals to survive freezing?
Entering anaerobic metabolism indefinitely
Generating constant internal heat
Controlled ice formation with cryoprotectants
Shedding all body water before winter
Question 3: Which claim is a common myth about freeze-tolerant animals?
They remain active while frozen
They use sugar molecules as cryoprotectants
Ice forms primarily outside cells
They live only in polar regions
Question 4: Which invertebrate strategy contrasts with vertebrate freeze tolerance?
Storing oxygen-rich fluids
Using heat-producing bacteria
Supercooling to avoid ice nucleation
Shedding exoskeletons each winter
Question 5: How does cryoprotectant accumulation help during freezing?
It rapidly dissolves formed ice
It increases metabolic rate to produce heat
It reduces ice crystal damage and stabilizes cells
It converts ice into harmless salt crystals
Question 6: If a freeze-tolerant frog is frozen in midwinter, what happens when temperatures rise?
It metamorphoses into a different species
It stays frozen permanently
It decomposes immediately on thaw
It thaws, resumes circulation, and recovers activity
Question 7: Why is controlled extracellular ice formation important?
It permanently removes water from the body
It speeds up metabolic reactions
It increases oxygen delivery to tissues
It prevents damaging ice inside cells
Question 8: Which ecological advantage explains why freeze tolerance evolved in some species?
Increases reproductive rate during winter
Allows survival through seasonal freezes in temperate habitats
Enables migration to polar regions
Helps animals to photosynthesize at low temperatures