Question

Which of the following statements is not correct ?

• A. Insects that consume pollen or nectar without bringing about pollination are called pollen / nector robbers.
• B. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil
• C. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style
• D. Some reptiles have also been reported as pollinators in some plant species

Answer 1

The Correct Option is D

To determine which statement is not correct, let's analyze each option:

1. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.

   This statement is correct. Pollen/nectar robbers refer to insects that feed on pollen or nectar without effectively pollinating the flowers.

2. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.

   This statement is correct. The interaction between pollen and pistil is crucial for successful fertilization, and various chemical signals facilitate this process.

3. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

   This statement is correct. While pollen from various species might initiate germination on a stigma, only pollen that is compatible (i.e., of the same species) successfully leads to fertilization by growing through the style.

4. Some reptiles have also been reported as pollinators in some plant species.

   This statement is technically incorrect in the context of common knowledge and typical biology education. While reptiles as pollinators are rare, they do play such a role in specific cases, but this is uncommon enough to be unexpected as a general statement. Thus, this option is not correct for general knowledge contexts, especially in traditional curricula.

In conclusion, the statement "Some reptiles have also been reported as pollinators in some plant species." is not typically correct in a general sense due to its rare occurrence, and thus, it is considered the incorrect statement in this context.