Chapter 1: Reproduction in Organisms — Online MCQ Test
ZOOLOGY · CLASS 12th · Tamil Nadu State Board
Practice Chapter 1: Reproduction in Organisms with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers modes of asexual and sexual reproduction across various animal groups. Students examine fission budding gemmule formation regeneration and phase variations in l....
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Chapter 1: Reproduction in Organisms — Important Questions & Answers
Which of the following is an example of binary fission?
- A. Hydra
- B. Amoeba
- C. Sycon
- D. Planaria
Answer: B. Amoeba
Amoeba reproduces asexually by binary fission, where one parent cell divides into two similar daughter cells.
Amoeba reproduces asexually by binary fission, where one parent cell divides into two similar daughter cells.
In Hydra, a new individual develops as an outgrowth from the parent body. This mode of reproduction is called:
- A. Fragmentation
- B. Budding
- C. Regeneration
- D. Binary fission
Answer: B. Budding
In budding, a small outgrowth called a bud develops into a new individual and later detaches from the parent.
In budding, a small outgrowth called a bud develops into a new individual and later detaches from the parent.
Which of the following statements best describes sexual reproduction?
- A. It involves only one parent and no gametes
- B. It produces offspring identical to the parent
- C. It involves fusion of male and female gametes
- D. It occurs only in unicellular organisms
Answer: C. It involves fusion of male and female gametes
Sexual reproduction requires the formation and fusion of gametes from two parents or two sexes, producing variation.
Sexual reproduction requires the formation and fusion of gametes from two parents or two sexes, producing variation.
Among the following, which pairing is correctly matched?
- A. Hydra - Gemmule formation
- B. Amoeba - Budding
- C. Sponges - Gemmule formation
- D. Planaria - Binary fission
Answer: C. Sponges - Gemmule formation
Sponges, especially freshwater sponges, are well known for gemmule formation as a survival strategy.
Sponges, especially freshwater sponges, are well known for gemmule formation as a survival strategy.
Which of the following statements about regeneration is correct?
- A. It occurs only in unicellular organisms
- B. It always produces two daughter individuals
- C. It is the ability to replace lost parts of the body
- D. It requires formation of gametes
Answer: C. It is the ability to replace lost parts of the body
Regeneration is the ability of some animals to regrow lost body parts; in certain organisms, a body fragment can also develop into a complete individual.
Regeneration is the ability of some animals to regrow lost body parts; in certain organisms, a body fragment can also develop into a complete individual.