Algae usually reproduce vegetatively by (A)____ asexually by formation of (B)_____ ad sexually bu fusion of (C)_____

Answer

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

1. **Understanding the Modes of Reproduction in Algae:**
- Algae can reproduce in three main ways: vegetatively, asexually, and sexually. Each mode has its own specific process.

2. **Filling in the First Blank (A):**
- For vegetative reproduction, algae typically reproduce by a process known as **fragmentation**. In this process, the parent body breaks into fragments, and each fragment can grow into a new individual.
- **Answer for Blank A:** fragmentation

3. **Filling in the Second Blank (B):**
- Asexual reproduction in algae is commonly achieved through the formation of **spores**. These spores can be of various types, such as zoospores, aplanospores, autospores, and tetraspores, depending on the species of algae.
- **Answer for Blank B:** spores

4. **Filling in the Third Blank (C):**
- Sexual reproduction in algae occurs through the **fusion of gametes**. Gametes can be similar in size and shape (isogamy) or different (heterogamy).
- **Answer for Blank C:** gametes

5. **Final Answers:**
- A: fragmentation
- B: spores
- C: gametes