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

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.

Multiple choice

Which of the following types of reproductions takes place in algae, when the gametes are of same size?

  1. Sexual reproduction with oogamous fusion

  2. Asexual reproduction by different kinds of spores

  3. Sexual reproduction with isogamous fusion

  4. Sexual reproduction with anisogamous fusion

  5. Vegetative reproduction by fragmentation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct. In this case, the gametes are similar in size, e.g. Spirogyra. The gametes can be flagellated or non-flagellated.

Multiple choice

Which of the following statements is/are false regarding the male sex organ in a Bryophyte? (a) It is known as antherozoid. (b) It is multicellular. (c) It produces biflagellate antheridium. (d) Antherozoids are released into water for fertilization.

  1. Only a

  2. Only c

  3. Only a and b

  4. Only b and d

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

Yes, both the statements are false and hence, this option is correct. Male sex organ in bryophytes is antheridium. Antheridium produces biflagellate antherozoid.