Role of insects in ecosystems MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 12, 2024

  1. Which role do insects primarily play in nutrient cycling?
    • A) Predation
    • B) Pollination
    • C) Decomposition
    • D) Seed dispersal
      Answer: C) Decomposition

  1. How do insects contribute to the pollination of flowering plants?
    • A) By consuming nectar
    • B) By transferring pollen
    • C) By laying eggs in flowers
    • D) By dispersing seeds
      Answer: B) By transferring pollen

  1. Which insect group is essential for the decomposition of organic matter?
    • A) Butterflies
    • B) Beetles
    • C) Dragonflies
    • D) Ants
      Answer: B) Beetles

  1. Insects that feed on dead organic material and help in nutrient recycling are known as:
    • A) Herbivores
    • B) Predators
    • C) Detritivores
    • D) Parasites
      Answer: C) Detritivores

  1. How do insects impact soil health?
    • A) By reducing soil moisture
    • B) By aerating the soil
    • C) By competing with plants
    • D) By increasing soil acidity
      Answer: B) By aerating the soil

  1. Which insect behavior is crucial for the ecological balance of many ecosystems?
    • A) Migration
    • B) Foraging
    • C) Nesting
    • D) Predation
      Answer: D) Predation

  1. What is the role of insects in seed dispersal?
    • A) They consume seeds
    • B) They carry seeds to new locations
    • C) They damage seeds
    • D) They bury seeds
      Answer: B) They carry seeds to new locations

  1. Which insects are known for their role in controlling pest populations?
    • A) Ladybugs
    • B) Butterflies
    • C) Dragonflies
    • D) Moths
      Answer: A) Ladybugs

  1. How do insects contribute to the health of aquatic ecosystems?
    • A) By pollinating water plants
    • B) By decomposing aquatic vegetation
    • C) By providing food for fish
    • D) By controlling algae growth
      Answer: C) By providing food for fish

  1. What ecological role do insects like termites play in forest ecosystems?
    • A) Pollination
    • B) Soil formation
    • C) Seed dispersal
    • D) Nest building
      Answer: B) Soil formation

  1. Which role do insects play in agricultural ecosystems?
    • A) Enhancing crop yield
    • B) Reducing soil fertility
    • C) Pollinating crops
    • D) Competing with crops for nutrients
      Answer: C) Pollinating crops

  1. How do insects contribute to the food web?
    • A) By acting as primary producers
    • B) By being primary consumers
    • C) By being secondary consumers
    • D) By decomposing organic material
      Answer: B) By being primary consumers

  1. Which type of insect is known for its role in breaking down dead plants and animals?
    • A) Wasps
    • B) Dragonflies
    • C) Beetles
    • D) Ants
      Answer: C) Beetles

  1. Insects that consume plant sap and are known as pests can negatively impact:
    • A) Soil fertility
    • B) Plant health
    • C) Animal health
    • D) Water quality
      Answer: B) Plant health

  1. Which insect behavior contributes to the ecosystem’s nutrient cycling process?
    • A) Migration
    • B) Feeding
    • C) Nesting
    • D) Mating
      Answer: B) Feeding

  1. What is the role of insects in maintaining plant diversity?
    • A) By consuming a variety of plants
    • B) By pollinating different plant species
    • C) By competing with plants
    • D) By consuming other insects
      Answer: B) By pollinating different plant species

  1. How do insects like honeybees benefit agriculture beyond pollination?
    • A) By improving soil quality
    • B) By controlling pests
    • C) By enhancing plant growth
    • D) By producing honey
      Answer: D) By producing honey

  1. Which insects are particularly important for the control of mosquito populations?
    • A) Dragonflies
    • B) Beetles
    • C) Butterflies
    • D) Moths
      Answer: A) Dragonflies

  1. How do insects affect the growth of forest ecosystems?
    • A) By spreading seeds
    • B) By competing with trees for resources
    • C) By decomposing leaf litter
    • D) By altering soil pH
      Answer: C) By decomposing leaf litter

  1. What role do insects play in the decomposition of animal carcasses?
    • A) They consume the meat
    • B) They remove bones
    • C) They accelerate the decay process
    • D) They attract scavengers
      Answer: C) They accelerate the decay process

  1. Which type of insect is crucial for the breakdown of plant material in composting systems?
    • A) Flies
    • B) Beetles
    • C) Ants
    • D) Wasps
      Answer: B) Beetles

  1. What is a significant impact of insect herbivores on crop plants?
    • A) Increased crop yield
    • B) Decreased plant diversity
    • C) Reduced crop health
    • D) Improved soil quality
      Answer: C) Reduced crop health

  1. How do insects contribute to the regulation of nutrient levels in aquatic ecosystems?
    • A) By consuming algae
    • B) By decomposing organic matter
    • C) By controlling fish populations
    • D) By filtering water
      Answer: B) By decomposing organic matter

  1. Which ecological function do insects like bees perform that is vital for maintaining biodiversity?
    • A) Pollination
    • B) Predation
    • C) Decomposition
    • D) Soil aeration
      Answer: A) Pollination

  1. In which way do insects contribute to the ecosystem services provided by forests?
    • A) By reducing biodiversity
    • B) By enhancing seed dispersal
    • C) By competing with plants for resources
    • D) By increasing soil erosion
      Answer: B) By enhancing seed dispersal

  1. How do insect decomposers benefit terrestrial ecosystems?
    • A) By producing plant seeds
    • B) By aiding in nutrient cycling
    • C) By controlling plant diseases
    • D) By pollinating crops
      Answer: B) By aiding in nutrient cycling

  1. Which insect group is known for its role in breaking down dung?
    • A) Beetles
    • B) Butterflies
    • C) Dragonflies
    • D) Wasps
      Answer: A) Beetles

  1. How do insects contribute to maintaining the balance of predator-prey relationships in ecosystems?
    • A) By being prey for larger animals
    • B) By preying on other insects
    • C) By competing with predators for resources
    • D) By increasing the number of predators
      Answer: B) By preying on other insects

  1. What role do insects play in the life cycle of many plants?
    • A) Seed predation
    • B) Pollination
    • C) Soil aeration
    • D) Water regulation
      Answer: B) Pollination

  1. Which ecological function do insects like ants provide in forest ecosystems?
    • A) Soil aeration
    • B) Seed predation
    • C) Nutrient cycling
    • D) Water filtration
      Answer: C) Nutrient cycling

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