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

The life cycle of Spirogyra is

  1. haplontic

  2. diplo-haplontic

  3. haplo-diplontic

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

The life cycle of Spirogyra is haplontic type in which all stages of life cycle are haploid (n) except zygospore (2n).

Multiple choice

External fertilization occurs in

  1. frog and rat

  2. crow and fish

  3. snake and fish

  4. frog and fish
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

External fertilization occurs when gametes are released into the environment, typically water, for fertilization. Frogs and fish commonly exhibit this behavior, whereas mammals and birds typically use internal fertilization.

Multiple choice

Which of the following organism reproduces by binary fission?

  1. Yeast

  2. Hydra

  3. Paramecium

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

The single-celled amoeba demonstrates a simple method of asexual reproduction i.e.binary fission. It divides in two parts by a process called binary fission, producing two smaller daughter cells. After a period of feeding and growth these two daughter cells will themselves divide in half.

Multiple choice

Syngamy means

  1. fusion of similar spores

  2. fusion of dissimilar spores

  3. fusion of cytoplasms

  4. fusion of gametes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Syngamy is the process of fusion of two gametes (male and female) to form a diploid zygote during the process of fertilization.

Multiple choice

Gemmae are the asexual reproductive bodies of

  1. scarpenia

  2. lobularia

  3. marchantia

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

Gemmae are small, asexual reproductive structures found in gemma cups on the thallus of liverworts like Marchantia, which can grow into new plants.

Multiple choice

Which of the following phenomena is shown in the life cycle of Obelia?

  1. Alternation of generation

  2. Metamorphosis

  3. Neoteny

  4. Ecdysis

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

Obelia shows alternation of sexual and asexual phases. The asexual phase is represented by colony, while the sexual phase is medusa. These phases alternate in the life cycle of Obelia. This alternation between sexual and asexual phases is called metagenesis.

Multiple choice

Sexual reproduction in plants was described for the first time by

  1. Camerarius

  2. Hofmeister

  3. Strasburger

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

Rudolf Camerarius was the first to experimentally demonstrate sexual reproduction in plants in his work on spinach and other species published in 1694, identifying the roles of stamens and pistils.

Multiple choice

Hybrid breakdown is failure of

  1. hybrid zygote to develop into offspring

  2. hybrid adult to produce fertile offspring

  3. fusion failure of ova and sperms of two species

  4. all the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hybrid breakdown is a post-zygotic reproductive isolation mechanism where the first-generation hybrids are viable and fertile, but the subsequent generations (F2 or backcrosses) are feeble or sterile. This prevents gene flow between the two parent species.

Multiple choice

In the process of sexual reproduction ______.

  1. only males are needed

  2. both male and female are needed

  3. only females are needed

  4. only mitosis is involved
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Both male and female gamete are needed for the process of fertilization