Biology

Biological Reproduction

762 Questions

Biological reproduction encompasses processes like asexual and sexual reproduction, alternation of generations, and specific mechanisms in plants and fungi. This topic is fundamental for biology paper preparation in various competitive exams. Practice these questions to solidify your understanding.

Asexual reproduction structuresPlant and fungi life cyclesCloning and fertilizationReproductive terminology

Biological Reproduction Questions

Multiple choice

Consider the following statements regarding different types of animals-

  1. Cnidarians are acoelomate
  2. All sponges (Porifera) are marine
  3. Flatworms (Platy helminthes) can reproduce asexually
  4. In arthropods, fertilization is always internal Which of these statement is/are correct?

  1. 1, only

  2. 1 and 3

  3. 2, 3 and 4

  4. 2 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cnidarians (jellyfish, sea anemones) have a simple body organization without a true coelom, making them acoelomate. Some sponges like Spongilla inhabit freshwater, so not all are marine. Flatworms can reproduce asexually through transverse fission. Many arthropods like crustaceans have external fertilization where eggs are released into water.

Multiple choice

Homokaryons are produced in

  1. induced fusion

  2. nucellus culture

  3. spontaneous fusion

  4. cell suspension technique
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homokaryons are produced by fusion of protoplasts lying in proximity.

Multiple choice

Which of the following is an endogenous dormancy?

  1. Physical dormancy

  2. Mechanical dormancy

  3. Chemical dormancy

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

Physiological dormancy inhibits embryo growth and seed germination until chemical changes take place. It is an endogenous dormancy.

Multiple choice

Why are fungi placed in a distinct kingdom?

  1. Because they do not undergo mitosis.

  2. Because they reproduce asexually.

  3. Because their sexual reproduction involves the union of different mating types strains.

  4. Because they have characteristics that are both plant-like and animal-like.

  5. Because they are non green and can not produce their own food.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi are unique because they are immotile and have a cell wall (like most plants), but are heterotrophic and not photosynthetic (like most animals).

Multiple choice

What is the advantage offered by the haploid state to the fungal life cycle?

  1. Quick reproduction

  2. More genetically diverse

  3. Large number of cell production

  4. Energy conservation for life sustenance

  5. Spread of the infective stage to healthy host
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Haploid spores can form and spread faster and more efficiently than diploid zygotes because they do not undergo meiosis.

Multiple choice

Which of the following is not a characteristic of sexual reproduction?

  1. It involves the formation of gametes

  2. It leads to variations in the offspring

  3. It produces identical copies of parents

  4. It promotes diversity of characteristics in the offspring
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexual reproduction involves gamete formation (A), leads to genetic variations (B), and promotes diversity (D) - all true. However, it does NOT produce identical copies - that's asexual reproduction. Offspring inherit unique combinations of traits from both parents.

Multiple choice

Individuals having both male and female sex organs are called

  1. asexual

  2. bisexual

  3. unisexual

  4. multi - sexual
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bisexual organisms (or hermaphrodites) possess both male and female reproductive organs either simultaneously or sequentially. Asexual reproduction involves one parent, unisexual organisms have separate sexes, and 'multi-sexual' is not a valid biological term.

Multiple choice

Which of the following statements is/are false?

a. Sex cells are involved in asexual reproduction whereas no sex cell is involved in sexual reproduction. b. In asexual reproduction, the offspring produced is an exact copy of the parent. c. An animal having female sex cells in its body is called a female.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false. Sex cells are involved in sexual reproduction whereas no sex cell is involved in asexual reproduction.

Multiple choice

Which of the following statements is/are false?

a. The new organism produced by asexual reproduction is exactly identical to the parent. b. The change from caterpillar to a silk moth is an example of metamorphosis. c. In the process of budding, the parent organism splits to form two new organisms.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. In the process of fission, the parent organism splits to form two new organisms.