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

In human body, the mode of reproduction for somatic cells is______________ , & for sex cells is______________ .

  1. meiosis & mitosis

  2. mitosis & mitosis

  3. mitosis & meiosis

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

Somatic cells divide to produce exact copies. This is how skin, and other body parts are replaced. In contrast, sex cells are not identical to the cells from which they came. Sperm and ova contain only half the number of chromosomes as somatic cells.

Multiple choice

Which of the following abilities help(s) to redevelop the lost body part or the formation of the whole body from a body fragment?

  1. Restorative regeneration

  2. Repairative regeneration

  3. Both of the above

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

Restorative regeneration is the specific biological process that allows organisms to regrow lost body parts or regenerate entire organisms from fragments. This differs from reparative regeneration, which only involves healing damaged tissues without complete replacement. Planaria and starfish are classic examples of organisms capable of restorative regeneration.

Multiple choice

Which of the following statements is incorrect?

  1. In amoeba, splitting of two cells takes place in any plane.

  2. In Leishmania, division of cell takes place in definite orientation.

  3. Spirogyra simply breaks into small pieces on maturation.

  4. Hydra can reproduce by simple fission.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydra reproduces by budding.

Multiple choice

Which of the following statements is correct about mitochondrial eve?

  1. First formed integrated nucleic acid

  2. First anatomically advanced human female

  3. First independently existing circular DNA

  4. First plasmid like structure in prokaryotes

  5. First self replicating mitochondria
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mitochondrial Eve refers to the matrilineal most recent common ancestor (MRCA) of all currently living anatomically modern humans, who is estimated to have lived approximately 100,000–200,000 years ago.

Multiple choice

Where is discus proligerus present?

  1. In the mass of follicular cells, around sperm

  2. In the mass of follicular cells, around ovum

  3. In the mass of yellow cells of ovarian cortex

  4. In the white body of ovarian cortex

  5. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Discus proligerous is also known as cumulus oophorus or follicular granulosa. It surrounds ovarian follicle which carries centrally placed ovum.

Multiple choice

Which egg is found in humans?

  1. Alecithal egg

  2. Microlecithal egg

  3. Mesolecithal egg

  4. Macrolecithal egg

  5. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is almost free of yolk.

Multiple choice

Consider the following statements:

  1. Most of the bacteria reproduce by binary fission.
  2. Human insulin is being commercially produced from a transgenic species of Escherichia.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. Binary fission is an asexual mode of reproduction, in which an organism splits to form another individual. Most of the bacteria reproduce by binary fission. Statement 2 is also correct. Yes, human insulin is produced from a transgenic species of Escherichia. 

Multiple choice

Consider the following statements: (a) In isogamy, the fusion of two different types of gametes takes place. (b) Female gamete is referred to as macro-gamete, bigger in size, produced in less numbers and are also non-motile. (c) Multiple fission involves the simultaneous division of parent into many small daughter individuals. Which of the above statements is / are correct?

  1. Only (a) and (c)

  2. Only (b) and (c)

  3. Only (a) and (b)

  4. All of the above

  5. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement (a) is incorrect. In anisogamy, the fusion of two different types of gametes takes place, e.g., higher invertebrates and all vertebrates. Statement (b) is correct. Female gamete is referred to as macro-gamete, bigger in size, produced in less numbers and are also non-motile. Statement (c) is correct. Multiple fission involves the simultaneous division of parent into many small daughter individuals.

Multiple choice

Consider the following statements: (a) In conjugation, the fusion of two gametes takes place completely and permanently. (b) Entire mature organism starts to act as gamete and fusion of individuals occurs, this is known as isoogamy. (c) Prostrate gland is present around urethra in males and discharges its secretion into urethra and contributes 15 to 30% of volume of semen. Which of the above statements is / are correct?

  1. Only (a) and (c)

  2. Only (a) and (b)

  3. Only (b) and (c)

  4. All of the above

  5. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (a) is correct. In syngamy, the fusion of two gametes takes place completely and permanently. It is most common type of reproduction in plants and animals. Statement (b) is incorrect. Entire mature organism starts to act as gamete and fusion of individuals occurs, this is known as hologamy. Statement (c) is correct. Prostrate gland is present around urethra in males and discharges its secretion into urethra and contributes 15 to 30% of volume of semen.