(a) What is the basic difference between asexual reproduction and sexaul reproduction ?
(b) Which of the following organisms reproduce by sexual method and which by asexual method ? Amoeba, Cats, Humans, Hydra, Birds

Answer

### Step-by-Step Solution:

**(a) Basic Difference between Asexual and Sexual Reproduction:**

1. **Definition of Asexual Reproduction:**
- Asexual reproduction involves only one parent. The offspring produced are genetically identical to the parent, meaning there is no genetic variation.

2. **Definition of Sexual Reproduction:**
- Sexual reproduction involves two parents (male and female). The offspring produced have genetic contributions from both parents, leading to genetic variation.

3. **Key Characteristics:**
- **Asexual Reproduction:**
- Uniparental (one parent).
- Offspring are clones of the parent.
- Less genetic variation.

- **Sexual Reproduction:**
- Biparental (two parents).
- Offspring have a mix of genetic traits from both parents.
- More genetic variation due to the fusion of gametes (sperm and egg).

4. **Formation of Zygote:**
- In sexual reproduction, the fusion of male and female gametes results in the formation of a zygote, which eventually develops into a new organism.

**(b) Classification of Organisms by Reproductive Method:**

1. **Amoeba:**
- Reproduces by asexual reproduction (binary fission).

2. **Cats:**
- Reproduce by sexual reproduction.

3. **Humans:**
- Reproduce by sexual reproduction.

4. **Hydra:**
- Reproduces by asexual reproduction (budding).

5. **Birds:**
- Reproduce by sexual reproduction.

### Summary of Reproductive Methods:
- **Asexual Reproduction:** Amoeba, Hydra
- **Sexual Reproduction:** Cats, Humans, Birds

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