Directions: In the following questions, a statement of assertion (A) ...
Asexual reproduction involves a single individual, which give rise to new individual that are genetically identical to parents. It is because, when organisms reproduce asexually, only mitotic divisions are involved and the chromosome number remains the same.
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Directions: In the following questions, a statement of assertion (A) ...
Assertion (A): Characteristics of parental plants can be preserved through asexual reproduction.
Reason (R): Vegetative reproduction involves only mitosis.
The correct answer is option A: Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Explanation:
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes. It is the process by which an organism produces offspring that are genetically identical to itself. Vegetative reproduction is a type of asexual reproduction in plants where new individuals are formed from vegetative parts of the parent plant, such as stems, roots, or leaves.
Characteristics of parental plants can be preserved through asexual reproduction because in vegetative reproduction, the new plants are genetically identical to the parent plant. This is because vegetative reproduction involves only mitosis, which is a type of cell division that produces genetically identical daughter cells.
Mitosis is a process of cell division that occurs in somatic cells (non-reproductive cells) and produces two identical daughter cells. During mitosis, the genetic material of the parent cell is replicated and divided equally between the daughter cells. As a result, the daughter cells have the same genetic information as the parent cell, and hence, the characteristics of the parental plants are preserved.
In vegetative reproduction, a part of the parent plant, such as a stem cutting or a root cutting, is used to grow a new plant. The new plant develops roots and shoots from the cutting, and since it is genetically identical to the parent plant, it inherits the same characteristics. This is why characteristics of parental plants can be preserved through asexual reproduction.
In conclusion, the assertion (A) that characteristics of parental plants can be preserved through asexual reproduction is true. The reason (R) provided for this assertion, which is that vegetative reproduction involves only mitosis, is also true and is the correct explanation of the assertion.
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