Reindeer Quiz
Questions: 16 · 10 minutes
1. A herd moves toward open tundra for calving and later returns toward more sheltered winter habitat. What best explains this movement?
Migration helps the herd reach seasonal forage and suitable calving grounds.
Antlers can grow only on treeless tundra.
Reindeer must avoid all periods of continuous Arctic daylight.
Reindeer need regular access to salt water to digest food.
2. Researchers hear repeated clicking sounds as a reindeer herd walks nearby. What is a likely source of the sound?
Air resonating inside hollow antler branches
Tendons moving over structures in the feet as the animals walk
A specialized chamber in the lungs used for herd calls
Upper and lower teeth striking together with every step
3. What is the relationship between reindeer and caribou?
They are the same species, with the common name varying by region and context.
Reindeer are a domesticated species descended from wild caribou, which are a separate species.
Caribou are the female form of reindeer.
Reindeer and caribou belong to different deer genera but occupy similar habitats.
4. Which description best matches the natural geographic distribution of reindeer?
High mountain ranges throughout the Southern Hemisphere
Northern tundra and boreal regions across parts of Eurasia and North America
Temperate forests found only in western Europe
Warm grasslands in Africa and southern Asia
5. A reindeer digs through snow to reach a pale, branching food source during winter. What is it most likely seeking?
Aquatic grasses
Wild berries
Lichens
Conifer seeds
6. Many calves in a herd are born within a relatively concentrated seasonal period. What advantage can this provide?
It allows newborn calves to teach one another the migration route.
It can overwhelm predators with more calves than they can target while aligning births with improving forage.
It ensures that every calf is born with the same biological sex.
It prevents calves from encountering parasites during summer.
7. Why can reindeer obtain nutrients from fibrous plants that humans cannot digest efficiently?
Their front teeth continually grind plants while they walk.
They store undigested plants in their antlers until winter.
They are ruminants whose digestive system uses microbial fermentation.
They use fibrous food mainly to cool their bodies rather than for nutrition.
8. A reindeer crosses soft, boggy tundra without sinking as deeply as a narrow-hoofed animal might. Which feature helps most?
Its hollow leg bones make its body nearly weightless.
Its broad, spreading hooves distribute weight over a larger area.
Its winter coat repels the ground beneath its feet.
Its antlers counterbalance its full body weight.
9. A reindeer repeatedly scrapes away snow with its hooves before lowering its head to feed. What is this behavior primarily for?
Marking a permanent territorial boundary
Building a sheltered sleeping hollow for the night
Creating a feeding crater to uncover vegetation beneath the snow
Removing biting insects from its lower legs
10. A wildlife keeper notices that reindeer footpads become softer in summer but tighten in winter, exposing more of the hoof rim. What is the main winter advantage?
It increases blood flow so the feet can melt deep snow.
It stores extra fat beneath the feet for long migrations.
It makes the hooves quieter when predators are nearby.
It provides a harder edge for gripping ice and digging through snow.
11. A reindeer's reflective eye tissue shifts toward a blue color during the dark Arctic winter. What is the likely benefit?
It increases sensitivity under very dim winter conditions.
It prevents any light from reaching the retina during snowstorms.
It provides sharper color vision for identifying summer flowers.
It allows the animal to produce its own visible light.
12. After winter rain falls on snow and then freezes, why may reindeer have difficulty feeding?
A hard ice layer can block access to vegetation under the snow.
The ice causes all lichens beneath it to become poisonous.
Frozen snow permanently damages the reindeer's antlers.
Rain removes the reindeer's ability to detect food by smell.
13. What is the main role of the soft velvet covering a growing reindeer's antlers?
It keeps completed antlers flexible during combat.
It camouflages the antlers from predators.
It prevents antlers from being shed at the end of the season.
It supplies blood and nutrients while the antlers develop.
14. Which antler trait makes reindeer unusual among living deer species?
Their antlers are permanent and continue growing throughout life.
Their antlers are made of keratin rather than bone.
Both males and females commonly grow antlers.
Only young reindeer grow antlers.
15. A festive illustration shows an antlered reindeer team in late December. Which biological fact makes female reindeer a plausible interpretation?
Females grow antlers only when they are trained to pull sleds.
Adult males never grow antlers in the wild.
Males and females always shed their antlers on exactly the same date.
Adult females often retain their antlers through winter, while many adult males shed theirs earlier.
16. Which adaptation helps a reindeer conserve heat and moisture while breathing cold, dry air?
Large ears that trap a layer of warm air
A broad tail that covers the nostrils while resting
Antlers that warm inhaled air before it reaches the nose
Complex nasal passages that exchange heat and moisture