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Quiz: Pollinators, Wildlife, and Plant Relationships

Test your understanding of pollinators, plant-animal relationships, and wildlife habitat with these review questions.

1. Approximately how many native bee species are found in Minnesota?

  1. About 20
  2. About 100
  3. Over 400
  4. Over 1,000
Show Answer

The correct answer is C. Minnesota is home to over 400 native bee species, ranging from large bumblebees to tiny metallic sweat bees. Most people only think of European Honeybees, which are not native to North America. Native bees are far more diverse and, flower for flower, are often more effective pollinators than honeybees.

Concept Tested: Native Bee Species

See: Chapter 6

2. What is the difference between a host plant and a nectar plant for butterflies?

  1. Host plants provide shelter from rain; nectar plants provide food
  2. Host plants are used for egg-laying and caterpillar feeding; nectar plants provide sugar energy for adults
  3. Host plants only grow in prairies; nectar plants only grow in woodlands
  4. Host plants are native; nectar plants are non-native
Show Answer

The correct answer is B. A host plant is where a butterfly lays eggs and where caterpillars feed. Caterpillars are often specialists restricted to one plant or a small group of related plants. Nectar plants provide the sugary liquid that fuels adult butterflies. A garden with only nectar flowers supports adults but cannot sustain the next generation. Both host plants and nectar plants are needed for healthy butterfly populations.

Concept Tested: Host Plants

See: Chapter 6

3. What makes the monarch butterfly's fall "super generation" different from summer generations?

  1. The super generation is smaller in size and cannot fly long distances
  2. The super generation breeds immediately upon emerging and dies within days
  3. The super generation enters reproductive dormancy, lives 8-9 months, and migrates up to 3,000 miles to Mexico
  4. The super generation feeds on different host plants than summer monarchs
Show Answer

The correct answer is C. The fall super generation is biologically unique. Unlike summer generations that live only 2-5 weeks and breed immediately, fall monarchs enter reproductive dormancy and live 8-9 months. They migrate up to 3,000 miles from northern breeding grounds to overwintering sites in the mountains of central Mexico. No single monarch makes the entire round trip; it takes 3-5 generations to complete one annual cycle.

Concept Tested: Monarch Migration

See: Chapter 6

4. What are the four stages of complete metamorphosis in butterflies?

  1. Egg, nymph, pupa, adult
  2. Egg, larva (caterpillar), pupa (chrysalis), adult
  3. Seed, sprout, bud, flower
  4. Egg, juvenile, teenager, adult
Show Answer

The correct answer is B. All butterflies and moths undergo complete metamorphosis with four distinct stages: egg (laid on host plants), larva or caterpillar (the feeding and growth stage), pupa or chrysalis (the transformation stage), and adult butterfly (which feeds on nectar and reproduces). Understanding this life cycle is essential for gardeners because caterpillars and adults often need completely different plants.

Concept Tested: Butterfly Life Cycle

See: Chapter 6

5. Why are about 70% of native bee species dependent on bare, undisturbed soil?

  1. They eat soil minerals to supplement their diet
  2. They nest in the ground and need exposed soil patches for nest construction
  3. They use mud to build above-ground nests on tree trunks
  4. They require soil contact to regulate their body temperature
Show Answer

The correct answer is B. About 70% of native bee species are ground-nesters that dig tunnels in bare, undisturbed soil to build their nests and lay eggs. This means exposed soil patches and sandy areas are just as important as flowers for supporting native bee populations. A garden that is completely mulched or covered may provide food but eliminates nesting habitat for the majority of native bee species.

Concept Tested: Pollinator Habitat Needs

See: Chapter 6

6. Which of the following is NOT a major cause of pollinator decline?

  1. Habitat loss from converting prairies and meadows to agriculture
  2. Planting too many native wildflowers in urban gardens
  3. Pesticide exposure, especially from neonicotinoids
  4. Climate change disrupting the timing between flower blooms and pollinator emergence
Show Answer

The correct answer is B. Planting native wildflowers actually helps pollinators rather than harming them. The real threats include habitat loss (Minnesota has lost over 99% of its original tallgrass prairie), pesticide exposure (neonicotinoids can kill pollinators or impair their navigation at sub-lethal doses), climate change (disrupting bloom-pollinator timing), disease and parasites, invasive species displacing native food plants, and light pollution affecting nocturnal moths.

Concept Tested: Pollinator Decline Causes

See: Chapter 6

7. Why are native oaks considered the most important trees for supporting bird populations?

  1. Oaks produce the largest leaves, which birds use for nest building
  2. Oaks are the tallest trees, giving birds protection from ground predators
  3. Oaks host more caterpillar species than any other tree genus, and their acorns feed many wildlife species
  4. Oaks produce the most oxygen, improving air quality for birds
Show Answer

The correct answer is C. Native oaks support more species of moths and butterflies (over 500 species nationally) than any other tree genus in North America. These caterpillars are the primary food source for nesting songbirds -- a single clutch of chickadees requires thousands of caterpillars. Additionally, oak acorns feed woodpeckers, jays, turkeys, deer, and squirrels. This combination makes oaks irreplaceable in wildlife-supporting landscapes.

Concept Tested: Bird Habitat Plants

See: Chapter 6

8. A gardener plants a butterfly garden full of nectar flowers but notices no caterpillars or chrysalises. What is the most likely problem?

  1. The garden is too small for butterflies to find
  2. The garden lacks host plants where butterflies can lay eggs and caterpillars can feed
  3. The nectar flowers are the wrong color to attract butterflies
  4. Butterflies only reproduce in wild prairies, not gardens
Show Answer

The correct answer is B. A butterfly garden with only nectar flowers supports adult butterflies but cannot sustain the next generation. Caterpillars are typically specialists that can only eat specific host plants. Without milkweed for monarchs, violets for fritillaries, or parsley-family plants for swallowtails, butterflies have no place to lay eggs and caterpillars have nothing to eat. An effective butterfly garden needs both nectar plants and host plants.

Concept Tested: Host Plants

See: Chapter 6

9. What toxic compounds do milkweed plants produce, and how do monarch caterpillars use them?

  1. Cyanide compounds that monarchs neutralize through special enzymes
  2. Cardenolides (cardiac glycosides) that monarchs sequester in their bodies, making themselves toxic to predators
  3. Alkaloids that monarchs convert into silk for their chrysalis
  4. Tannins that monarchs use to camouflage themselves as leaves
Show Answer

The correct answer is B. Milkweeds produce toxic compounds called cardenolides (cardiac glycosides) in their milky sap. While most insects cannot tolerate these toxins, monarch caterpillars have evolved the ability to eat milkweed and sequester the cardenolides in their own bodies. This makes both caterpillars and adult butterflies distasteful to predators -- a phenomenon called aposematism, where bright warning colors (the monarch's orange and black) advertise toxicity.

Concept Tested: Milkweed and Monarchs

See: Chapter 6

10. What is an "oligolectic" bee, and why does this specialization make certain bee species vulnerable?

  1. A bee that only visits flowers at night, making it vulnerable to light pollution
  2. A bee that collects pollen from only one plant genus or family, so it cannot survive if its host plants disappear
  3. A bee that nests only in tree cavities, making it vulnerable to deforestation
  4. A bee that migrates long distances, making it vulnerable to habitat fragmentation
Show Answer

The correct answer is B. Oligolectic bees are pollen specialists that collect pollen from only one plant genus or family. Squash bees, for example, collect pollen exclusively from squash-family flowers, and certain mining bees specialize on willows. When specialist bees lose their host plants due to habitat destruction or invasive species, they cannot switch to alternatives. This makes preserving native plant diversity directly tied to preserving bee diversity.

Concept Tested: Pollen Sources

See: Chapter 6

Ready to use these ideas rather than recall them? Try the Applied Quiz for this chapter — ten scenario questions that put you in a situation and ask what to do.