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

Which of the following statements is/are false?

a. The spore formation method of asexual reproduction is used only by unicellular organisms. b. The process of getting back a full organism from its body parts is called regeneration. c. Tissue culture can grow plants round the year, irrespective of weather or season.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

The spore formation method of asexual reproduction is used only by unicellular and multicellular organisms.

Multiple choice

Which of the following statement is/are false regarding somatic cells and gametes?

  1. Somatic cells are diploid cells, whereas the gametes are haploid cells.

  2. Somatic cells form external structures of the body, whereas gametes form internal.

  3. Somatic cells do not fuse during sexual reproduction, whereas gametes fuse during sexual reproduction giving rise to a diploid zygote.

  4. Somatic cells are found almost everywhere in the body, whereas gametes are restricted to certain parts.

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

Yes, it is the answer as the statement is false. Somatic cells form internal and external structures of the body, whereas gametes do not.

Multiple choice

Which of the following statements is/are true regarding sexual reproduction?

(a) Sexual reproduction involves two parents. (b) The offspring gets its set of genes from any of the two individuals. (c) Sexual reproduction involves gamete formation.

  1. only a

  2. only b

  3. only c

  4. a and c

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

Yes, it is correct. Statements a and c are correct, whereas b is incorrect. In sexual reproduction, the offspring gets sets of genes from two different individuals. No, it is incorrect. Statement b is incorrect.

Multiple choice

Which of the following statements regarding asexual reproduction is/are incorrect? a) It invloves single parent. b) Variations are usually very minor. c) Variations take too long to show effect.

  1. only a and b

  2. a, b and c

  3. only a

  4. only c

  5. none of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, this is the correct answer as all the three statements are true. Asexual reproduction involves a single parent, and is hence not ideal ideal for facilitating variations. Some minor variations do occur due to inaccuracies in DNA replication. But, the quantum of variations would be too little and would take too many years to show effect.

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 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

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) Degenerative process of germ cells (i.e. oogonia) is called atresia. (b) If only males are produced parthenogenitically, then the process is called thelotoky. (c) Arrhenotoky is the process of production of only female individuals parthenogenitically. Which of the above statements is / are incorrect?

  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
C Correct answer
Explanation

Statement (a) is correct. Degenerative process of germ cells (i.e., oogonia) is called atresia. Statement (b) is incorrect. If only males are produced parthenogenitically, then the process is called arrhenotoky. Statement (c) is incorrect. Thelotoky is the process of production of only female individuals parthenogenitically.