Which of the given sets are matched correctly ?
a. Chondrus - Algin
b. Gracilaria - Agar
c. Cycas - Coralloid root
d. Pinus - Canada balsum
e. Adiantum - Walking fern
f. Lycopodium - Cord moss
g. Cedrus - Independent gametophyte
h. Sequoia - Tallest gymnosperm

Options

A. b , c , e , h
B. a , b , c , e , f
C. b , c , e , g , h
D. b , c , d , e , g , h

Answer

To determine which of the given sets are matched correctly, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Chondrus - Algin**
- Chondrus is a type of red algae (Rhodophyceae).
- Algin is a polysaccharide found in brown algae (Phaeophyceae), not red algae.
- **Conclusion:** This match is incorrect.

2. **Gracilaria - Agar**
- Gracilaria is also a red algae (Rhodophyceae).
- Agar is indeed derived from Gracilaria and is widely used in food and microbiology.
- **Conclusion:** This match is correct.

3. **Cycas - Coralloid root**
- Cycas is a genus of gymnosperms.
- Coralloid roots are associated with Cycas, which help in nitrogen fixation through symbiosis with cyanobacteria.
- **Conclusion:** This match is correct.

4. **Pinus - Canada balsam**
- Canada balsam is a resin obtained from the balsam fir tree, not from Pinus (which is a genus of pines).
- **Conclusion:** This match is incorrect.

5. **Adiantum - Walking fern**
- Adiantum is known as the walking fern because it produces new plants at the tips of its fronds that touch the ground.
- **Conclusion:** This match is correct.

6. **Lycopodium - Cord moss**
- Lycopodium is a genus of clubmosses.
- Cord moss refers to Funaria hygrometrica, not Lycopodium.
- **Conclusion:** This match is incorrect.

7. **Cedrus - Independent gametophyte**
- Cedrus is a genus of gymnosperms.
- In gymnosperms, the dominant phase is the sporophyte, and the gametophyte is not independent.
- **Conclusion:** This match is incorrect.

8. **Sequoia - Tallest gymnosperm**
- Sequoia is known as the giant redwood and is indeed the tallest gymnosperm.
- **Conclusion:** This match is correct.

### Summary of Correct Matches:
- Correctly matched sets: **B (Gracilaria - Agar), C (Cycas - Coralloid root), E (Adiantum - Walking fern), H (Sequoia - Tallest gymnosperm)**.
- Incorrectly matched sets: **A (Chondrus - Algin), D (Pinus - Canada balsam), F (Lycopodium - Cord moss), G (Cedrus - Independent gametophyte)**.

### Final Answer:
The correctly matched sets are B, C, E, and H.

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