Biology ยท Environmental Studies

Biology of Insects and Pollination

861 Questions

Insect biology and pollination focus on ecological relationships, crop science, and practical applications like apiculture. These topics regularly appear in general science sections of competitive exams. Review core concepts to build accuracy for test day.

Apiculture and honeyTypes of pollinationInsect binomial nomenclatureCrop damaging pestsFriend of farmers organism

Biology of Insects and Pollination Questions

Multiple choice

(A) The rim of the pitcher of Nepenthes is beautifully coloured. (B) The rim of the pitcher is provided with a row of nectar glands for attracting insects.

  1. A is true; B is false

  2. A is false; B is true

  3. Both are true

  4. Both are false
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both statements correctly describe Nepenthes pitcher adaptations. The rim (peristome) is colorful to attract insects, and it bears nectar glands that secrete nectar to lure prey into the trap.

Multiple choice

Pollination done by birds is known as

  1. Anemophily

  2. Entomophily

  3. Hydrophily

  4. Ornithophily
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ornithophily or Bird Pollination is the pollination of flowering plants by birds.

Multiple choice

The rearing of silk worms for obtaining silk is called

  1. agriculture

  2. aquaculture

  3. horticulture

  4. sericulture
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sericulture is the specialized practice of rearing silkworms for silk production. It involves mulberry cultivation, silkworm breeding, and silk extraction - a significant agricultural industry in India.

Multiple choice

Which of the following pairs is incorrect?

  1. Cantharophily - Beetle

  2. Chiropterophily - Bats

  3. Ornithophily - Birds

  4. Sapromyophily - Moths
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sapromyophily is pollination by flies which like dung, dead and decaying odour.

Multiple choice

Which of the following animals is called farmer friend?

  1. Ant

  2. Earthworm

  3. Bee

  4. Butterfly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthworms are called 'farmer friends' because they improve soil fertility by aerating it, breaking down organic matter, and their castings enrich the soil with nutrients. They're essential for sustainable agriculture. Ants, bees, and butterflies have ecological roles but aren't directly linked to soil improvement.

Multiple choice

Which of the following compounds serve as an attractant to various predatory insects?

  1. cis-3-Hexen-1-ol

  2. Homocysteine

  3. Homotaurine

  4. Hydroquinone
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

cis-3-Hexen-1-ol is a colourless oily liquid with an intense grassy-green odour of freshly cut green grass and leaves. It is produced in small amounts by most plants and it acts as an attractant to many predatory insects. cis-3-Hexen-1-ol is a very important aroma compound that is used in fruit and vegetable flavors and in perfumes.

Multiple choice

The only insect which gives food to human being

  1. bee

  2. housefly

  3. silkworm

  4. butterfly
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Honey bees are the only insects that produce food (honey) directly consumed by humans. While silkworms provide valuable products (silk), they do not produce food. The question specifically asks for insects that give food to humans, making bees the correct answer.

Multiple choice

Which of the following pairs is matched correctly?

  1. Pollination by insects - Hydrophilly

  2. Pollination by water - Entomophily

  3. Pollination by birds - Anemophily

  4. Pollination through air - Ornithophily

  5. Pollination by snails - Malachophily
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Pollination by snails is called Malachophily.

Multiple choice

Gene that renders plants immune to bollworm pests

  1. Cry 1 Ac

  2. Cry 2 Ac

  3. Cry 3 Ac

  4. Cry 4 Ac

  5. Cry 5 Ac
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bt cotton plants are genetically modified with Cry1Ac gene from Bacillus thuringiensis, which produces a protein toxic to bollworm pests. This was a key component of India's GM cotton revolution.