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

Endogamy (self fertilisation) is observed in

  1. ascaris

  2. earthworm

  3. taenia

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

Taenia (tapeworm) is hermaphroditic and can practice self-fertilization. Ascaris has separate sexes, earthworms are hermaphroditic but typically cross-fertilize, and honeybees have separate sexes with complex reproductive systems.

Multiple choice

Most terrestrial animals reproduce by

  1. internal fertilisation

  2. external fertilisation

  3. dichogamy

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

Most terrestrial animals use internal fertilization to protect gametes from desiccation (drying out) in terrestrial environments. External fertilization is primarily an aquatic adaptation, while dichogamy and pollination are not standard modes of animal reproduction.

Multiple choice

Anisogamy means fusion of dissimilar gametes. It is found in

  1. man

  2. earthworm

  3. pila

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Anisogamy (fusion of morphologically different gametes) is found in humans (sperm and egg), earthworms (though they are hermaphroditic, they produce different sperm and egg types), and pila (apple snail). All these organisms produce distinct male and female gametes.

Multiple choice

Which of the following organisms reproduces asexually?

  1. Human

  2. Fungus

  3. Algae

  4. Animals

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

In asexual reproduction, an individual can reproduce without involvement of another individual of that species. The division of a bacterial cell into two daughter cells is an example of asexual reproduction.

Multiple choice

Which of the following statements is/are false?

a. In the asexual reproduction method, certain body cells of the parent organism undergo repeated mitotic cell divisions to form two or more new organisms of the same kind. b. Humans, frogs, hens, etc. reproduce by the method of sexual reproduction. c. In binary fission, the parent organism splits to form many new organisms at the same time.

  1. Only a

  2. Both a and b

  3. Only c

  4. Both b and c

  5. Only b
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. This is a wrong option as this statement is true.

Multiple choice

Match the following:

 
a. Fission 1. It is the process in which the parent plant produces hundreds of microscopic reproductive units.
b. Budding 2. It is the process in which a small part of the body of the parent organism grows out, which detaches and becomes a new organism.
c. Spore formation 3. It is the process in which a unicellular organism splits to form two or more new organisms.

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 2, b - 1, c - 3

  4. a - 2, b - 3, c - 1

  5. a - 1, b - 2, c - 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Fission is the process in which a unicellular organism splits to form two or more new organisms. Budding is the process in which a small part of the body of the parent organism grows out, which detaches and becomes a new organism. Spore formation is the process in which the parent plant produces hundreds of microscopic reproductive units.

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

Consider the following statements:

  1. In ‘Bt cotton and Bt brinjal’, the common term ‘Bt’ refers to as Bacterial technique.
  2. The twins whose bodies are joined together at birth are called fratenal twins.

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
D Correct answer
Explanation

Statement (1) is incorrect. In ‘Bt cotton and Bt brinjal’, the common term ‘Bt’ refers to as Bacillus thuringiensis, a common soil bacterium. When Bt is placed before a plant name, such as in Bt Brinjal, it means the plant has been genetically modified to produce a protein toxic to certain insects in the same way the bacteria does. Statement (2) is also incorrect. The twins whose bodies are joined together at birth are called conjoined/ Siamese twins.

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.