Biology

Biological Reproduction

806 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

Which of the following statements is not true for sexual reproduction?

  1. Two parents contribute sex cells for fertilization.

  2. Male sex cell is called sperm and female sex cell is called ovum.

  3. Offsprings have exactly same characters as parent.

  4. Sexual reproduction results in variation of characters.

  5. Most organisms reproduce by means of sexual reproduction.

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexual reproduction results in variation of characters as it receives some traits of both parents and is never exactly like either parent. 

Multiple choice

Which of the following is not true about asexual reproduction?

  1. There is fusion of male and female gametes.

  2. A large number of offsprings are produced.

  3. Only single parent is required.

  4. Organisms reproduce during favourable conditions.

  5. Hydra reproduces asexually.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fusion of male and female gametes takes place in sexual reproduction. 

Multiple choice

What is the mode of reproduction of spirogyra?

  1. Binary fission

  2. Multiple fission

  3. Fragmentation

  4. Budding

  5. Vegetative propagation

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Spirogyra, the offsprings are formed by the process of fragmentation. In fragmentation, the parent organism is broken into small fragments, and each fragment is capable of reproducing new offspring/organism of the same kind.

Multiple choice

Zygote is produced during

  1. sexual reproduction

  2. asexual reproduction

  3. vegetative propagation

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A zygote is a fertilized egg formed by the fusion of male and female gametes during sexual reproduction. This fusion is the defining characteristic of sexual reproduction. Asexual reproduction (budding, fission, etc.) and vegetative propagation do not involve zygote formation since they don't require gamete fusion.

Multiple choice

Sometimes, larve develops gonads and reproduces by normal sexual reproduction. It is called

  1. regeneration

  2. neoteny

  3. autotomy

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

Neoteny is the retention of larval characteristics in sexually mature adults, where the larva develops gonads and reproduces while still in larval form. Regeneration is regrowing lost parts. Autotomy is self-amputation (like lizards dropping tails). Paedogenesis is reproduction by larvae, but neoteny specifically describes the retention of juvenile features in adulthood.

Multiple choice

When male differs from female in morphology, it is called

  1. heterogamy

  2. homogamy

  3. sexual dimorphism

  4. hermaphroditism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexual dimorphism is the condition where males and females of the same species show differences in size, appearance, or other morphological traits (like peacock feathers, lion manes). Heterogamy refers to mating between different types. Homogamy means mating between similar types. Hermaphroditism is having both male and female reproductive organs.

Multiple choice

In the sexual reproduction, there must be a union of

  1. one male and one female reproductive cell

  2. two male reproductive cells

  3. two female reproductive cells

  4. two male cells with two female reproductive cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sexual reproduction fundamentally requires the fusion of gametes from two parents. This means one male reproductive cell (sperm) must unite with one female reproductive cell (ovum/egg). Options involving two cells of the same sex or multiple cells of both sexes describe processes that don't occur in standard sexual reproduction.