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

The oocysts of Cystoisospora belli are long and oval shaped. Which among the following statements regarding the life cycle of Cystoisospora belli is incorrect?

  1. An oocyst with two sporoblasts is released in the stool of infected person.

  2. The sporocysts each divide twice, resulting in four sporozoites.

  3. Transmission occurs when these mature oocysts are ingested.

  4. The sporozoites invades the epithelial cells of the allimentary.

  5. Trophozoites develop into schizonts.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An oocyst with one sporoblast is released in the stool of infected person. After the oocyst has been released, the sporoblast matures further and divides into two.

Multiple choice

Embryo formation is related to

  1. asexual reproduction

  2. spore formation

  3. fertilisation

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

Embryo formation only takes place when male and female gametes fuse to form zygote. This process is called fertilisation. As it involves both parents, it is known as sexual mode of reproduction.

Multiple choice

Caecilians copulate in which of the following modes?

  1. Partial internal fertilisation

  2. Complete internal fertilisation

  3. External fertilisation

  4. Parthenogenesis

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

Caecilians use complete internal fertilisation as a mode of reproduction. The male caecilians have a long tube-like organ, the phallodeum, which is inserted into the cloaca of the female for two to three hours.

Multiple choice

Identical twins arise when

  1. sperm divides into two halves

  2. two sperms fuse with one ovum

  3. egg divides into two halves

  4. one sperm fuses with two ova
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Identical twins arise when egg divides into two halves.