Prepare for NEET Biology Sexual Reproduction in Flowering Plants (Pre Fertilization Structure And Events) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to examine pollen development, stigma, and pollination.
NEET Questions / Botany / Sexual Reproduction in Flowering Plants / Pre Fertilization Structure And Events
A flower exhibiting cleistogamy, but with viable pollen grains, fails to produce seeds. Which of the following is the LEAST likely explanation for this observation?
Lack of pollinating agents
Failure of pollen tube growth
Non-functional stigma
Problems with fertilization
A researcher observes a plant species where the generative cell undergoes mitosis before pollination, resulting in two sperm cells within the pollen grain. How might this unusual characteristic affect double fertilization?
Prevent double fertilization from occurring.
Enhance the efficiency of double fertilization.
Potentially lead to the fertilization of both the egg cell and a synergid, disrupting endosperm development.
Have no significant impact on the process of double fertilization.
Imagine a plant species where the pollen tube enters the embryo sac through the chalaza instead of the micropyle (chalazogamy). Which of the following would be the LEAST affected by this unusual entry pathway?
The path of pollen tube growth within the style.
The interaction between the pollen tube and the synergids.
The genetic makeup of the sperm cells.
The timing of pollen tube discharge into the embryo sac.
If insect populations declined significantly, what would be the most likely impact on the reproduction of water hyacinth and water lily?
Increased seed production
No change in seed production
Decreased seed production
Shift to self-pollination
A botanist observes a new plant species with flowers containing a single ovule per ovary, clustered in an inflorescence. Considering these characteristics, which pollination vector is LEAST likely?
Wind
Insects
Water
Birds
Why are large, colourful, and fragrant flowers with nectar advantageous for insect pollination?
They attract insects and provide a food reward.
They are easily pollinated by the wind.
They are more resistant to diseases.
They produce more seeds.
How does the structure of the corn silk facilitate its function?
Provides a sugary reward for pollinators
Protects the ovules from desiccation
Aids in seed dispersal
Increases surface area for pollen capture
Assertion: Dioecious plants cannot undergo autogamy.
Reason: Dioecious plants have separate male and female individuals.
Choose the correct option:
Both assertion and reason are true, and the reason is the correct explanation for the assertion.
Both assertion and reason are true, but the reason is not the correct explanation for the assertion.
Assertion is true, but reason is false.
Assertion is false, but reason is true.
Choose the mis –matched option.
Option 1: Dog - Animal
Option 2: Rose - Flower
Option 3: Apple - Vegetable
Option 4: Car - Vehicle
Choose the mis –matched option.
Wind – Cannabis – Anemophily
Water – Zoostera – Hydrophily
Insect – Salvia – Entomophily
Birds – Adansonia – Ornithophily
