Some organism are capable of asexual or series reproduction. Under favourable conditions, reproduction proceeds asexually . When conditions become must stressful reproduction switches to a sexual mode . Why?

Options

A. Sexual reproduction is sample and more rapid allowing larger numbers of offspring to be produced
B. Sexual reproduction requires two separate individuals who can mutually provide nutrient support during stress
C. Sexual reproduction producess individuals with combinations of recombined chromosomes increasing diversity
D. Asexual reproduction requires more energy

Answer

### Step-by-Step Solution:

1. **Understanding Reproductive Strategies**:
- Organisms can reproduce either asexually or sexually. Asexual reproduction involves a single parent producing offspring, while sexual reproduction involves two parents contributing genetic material.

2. **Conditions Favoring Asexual Reproduction**:
- Under favorable environmental conditions (e.g., abundant resources, optimal climate), organisms tend to reproduce asexually. This method is generally faster and allows for the rapid increase of population size, as it does not require finding a mate.

3. **Switching to Sexual Reproduction**:
- When environmental conditions become stressful (e.g., scarcity of resources, extreme temperatures), organisms may switch to sexual reproduction. This is because sexual reproduction increases genetic diversity among offspring.

4. **Importance of Genetic Diversity**:
- Increased genetic diversity is crucial for the survival of a species in changing environments. Offspring produced through sexual reproduction have a combination of traits from both parents, which may provide better adaptability to new or challenging conditions.

5. **Energy Considerations**:
- Although asexual reproduction is often seen as less energy-intensive, the switch to sexual reproduction under stress is not primarily about energy but rather about enhancing survival through diversity.

6. **Conclusion**:
- In summary, organisms switch from asexual to sexual reproduction in response to stressful conditions to enhance genetic diversity, which can improve the chances of survival in a changing environment.