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Bulliform cells are 1 Are large, e...

Bulliform cells are
1 Are large, empty and colourful
2 Present in all isobilateral and few dorsiventral leaves
3 When flaccid they curl outward due to water excess
4 Present on adaxial epidermis of leaves

A

Are large, empty and colourful

B

Present in all isobilateral and few dorsiventral leaves

C

When flaccid they curl outward due to water excess

D

Present on adaxial epidermis of leaves

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The correct Answer is:
**Step-by-Step Text Solution:** 1. **Understanding Bulliform Cells:** Bulliform cells are specialized cells found in the epidermis of monocotyledonous plants (monocots). They play a crucial role in the regulation of leaf movement in response to water availability. 2. **Analyzing the Options:** - **Option 1:** "Are large, empty and colorful." - Bulliform cells are indeed large and empty due to their vacuoles, but they are colorless, not colorful. Therefore, this option is incorrect. - **Option 2:** "Present in all isobilateral and few dorsiventral leaves." - Bulliform cells are primarily found in monocots, which typically have isobilateral leaves. They are not present in dicots, which often have dorsiventral leaves. Thus, this option is also incorrect. - **Option 3:** "When flaccid they curl outward due to water excess." - This statement is misleading. When bulliform cells lose water and become flaccid, they actually curl inward to reduce leaf surface area and minimize water loss. Therefore, this option is incorrect. - **Option 4:** "Present on adaxial epidermis of leaves." - Bulliform cells are located on the upper surface (adaxial surface) of monocot leaves. This statement is correct. 3. **Conclusion:** Based on the analysis of all options, the correct answer is **Option 4: Present on adaxial epidermis of leaves.** ---
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