Which of the following statements is not correct regarding pollen grains?
Some reptiles have also been reported as pollinators in some plant species
Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil
Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers
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
Which of the following statements is not correct regarding pollen grains?
Some reptiles have also been reported as pollinators in some plant species
Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil
Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers
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
The correct option is D 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
The correct option is D.
Explanation for the correct option:
- A seed plant's pollen is a collection of microspores that typically takes the form of fine dust.
- Each pollen grain is a tiny body with a unique shape and structure that develops in seed-bearing plants' male structures before being carried by a variety of agents (such as wind, water, insects, etc.) to the female structures, where fertilization takes place.
- Numerous species' pollen grains can germinate on a flower's stigma, but only one pollen tube from the same species can develop into the style since the other species' pollen grains are incompatible with another flower and will prevent their germination on that flower.
- An androecium, the male reproductive organ of a flower, is found in a pollen grain, a tiny structure.
- The generative cell, which releases the sperm nuclei, and the tube cell, which changes into a pollen tube, may all be found inside the pollen grain.
- Male reproductive cells (gametes) are present in pollen grains, which are haploid microgametophytes found in plants.
- Pollinators are animals or insects that spread pollen from one plant to another.
Final answer: 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 statement is incorrect regarding pollen grains.
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
The correct option is D.
Explanation for the correct option:
- A seed plant's pollen is a collection of microspores that typically takes the form of fine dust.
- Each pollen grain is a tiny body with a unique shape and structure that develops in seed-bearing plants' male structures before being carried by a variety of agents (such as wind, water, insects, etc.) to the female structures, where fertilization takes place.
- Numerous species' pollen grains can germinate on a flower's stigma, but only one pollen tube from the same species can develop into the style since the other species' pollen grains are incompatible with another flower and will prevent their germination on that flower.
- An androecium, the male reproductive organ of a flower, is found in a pollen grain, a tiny structure.
- The generative cell, which releases the sperm nuclei, and the tube cell, which changes into a pollen tube, may all be found inside the pollen grain.
- Male reproductive cells (gametes) are present in pollen grains, which are haploid microgametophytes found in plants.
- Pollinators are animals or insects that spread pollen from one plant to another.
Final answer: 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 statement is incorrect regarding pollen grains.
