Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because

Options

A. sexual reproduction is a lengthyl process
B. gametes of parents have qualitatively different genetic composition
C. genetic material comes from parents of two different species
D. greater amount of DNA is involved in sexual reproduction

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Reproduction Types:**
- There are two main types of reproduction: sexual and asexual.
- Asexual reproduction involves a single parent and produces offspring that are genetically identical to the parent.

2. **Variation in Asexual Reproduction:**
- In asexual reproduction, since there is only one parent, the offspring are clones of the parent.
- This results in little to no genetic variation among the offspring.

3. **Understanding Sexual Reproduction:**
- Sexual reproduction involves two parents, each contributing genetic material to the offspring.
- This process includes the fusion of gametes (sperm and egg), leading to a combination of genetic traits from both parents.

4. **Variation in Sexual Reproduction:**
- The combination of genetic material from two different parents introduces genetic diversity.
- This genetic variation is essential for evolution and adaptation in changing environments.

5. **Analyzing the Options:**
- Option A: "Reproduction is a lengthy process." - This is not a valid reason for variation.
- Option B: "Parents have qualitatively different genetic composition." - This is correct, as the involvement of two parents leads to variation.
- Option C: "Genetic material comes from parents of two different species." - This is incorrect; sexual reproduction occurs between parents of the same species.
- Option D: "Greater amount of DNA is involved in sexual reproduction." - This is misleading; the amount of DNA does not directly correlate with variation.

6. **Conclusion:**
- The correct answer is Option B: "Parents have qualitatively different genetic composition," which explains why sexual reproduction leads to more variation compared to asexual reproduction.

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