Question

There is no natural death in single celled organisms like Amoeba and bacteria because

• A. they cannot reproduce sexually
• B. they reproduce by binary fission
• C. parental body is distributed among the offspring
• D. they are microscopic

Answer 1

The correct option is C

parental body is distributed among the offspring

The correct option is C.

Explanation of the correct option:

1. Single-celled organisms reproduce asexually which means that only a single parent is involved in the production of offspring.
2. The parent body splits into two individual cells and this type of asexual reproduction is known as binary fission.
3. Firstly, the cytoplasm of the parent body is divided that further leads to the splitting of the nucleus as well into two equal halves.
4. Each divided cell produced is developed into an offspring which is called a daughter cell.
5. Hence, practically there is no death of unicellular organisms rather they are divided into their new generation cells i.e. daughter cells.

Explanation of the incorrect options:

Option A:

1. The unicellular organisms reproduce asexually and cannot reproduce sexually like multicellular organisms.
2. However, this is not an admissible reason for the given statement.

Option B:

1. Asexual reproduction in unicellular organisms is of various types such as binary fission, multiple fission, and budding.
2. However, this does not justify the statement of no natural death in single-celled organisms.

Option D:

1. Single-celled organisms are microscopic organisms that can only be seen through a microscope and not by naked eyes.
2. For example, Bacteria, protozoa, etc. are unicellular organisms that reproduce asexually.
3. However, this is not an admissible reason for the given statement.

Final answer: There is no natural death in single-celled organisms like Amoeba and bacteria because the parental body is distributed among the offspring.