Which of the following is an incorrect statement ?

Options

A. Brown algae has chlorophyll a and c, and fucoxanthin
B. In green algae, the cell wall is made up of cellulose.
C. The red algae usually reproduces vegetatively by fragmentation .
D. The food is stored as laminarin in red algae

Answer

To determine which statement is incorrect, let's analyze each of the four statements provided:

1. **Statement 1**: Brown algae has chlorophyll A and C and phycobilins.
- Brown algae, also known as Pheophyceae, indeed contains chlorophyll A and C, along with the pigment fucoxanthin (not phycobilins). This statement is mostly correct, but the mention of phycobilins is inaccurate since phycobilins are found in red algae.

2. **Statement 2**: In green algae, the cell wall is made up of cellulose.
- This statement is correct. Green algae, or Chlorophyta, have cell walls primarily composed of cellulose.

3. **Statement 3**: Red algae usually reproduce vegetatively by fragmentation.
- This statement is also correct. Red algae, or Rhodophyta, can reproduce both sexually and asexually, and they do reproduce vegetatively through fragmentation.

4. **Statement 4**: The food is stored as laminarin in red algae.
- This statement is incorrect. Red algae store their food as Floridian starch, while laminarin is the storage carbohydrate found in brown algae.

Based on this analysis, the incorrect statement is:

**Answer**: The food is stored as laminarin in red algae (Statement 4).