Pollination in water hyacinth and water lily is brought about by the agency of -
- water
- insects or wind
- birds
- bats
The Correct Option is B
Solution and Explanation
Correct Answer:
Insects or wind
Explanation:
Though water hyacinth and water lily are aquatic plants, pollination is not usually carried out by water (hydrophily) in these species. Instead:
- Water lily has large, attractive flowers which are often pollinated by insects such as beetles.
- Water hyacinth also relies on insects or wind for pollination, as its flowers emerge above the surface of the water.
Therefore, insects or wind are the primary pollinating agents in these plants, not water.
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Questions Asked in NEET exam
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector\(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :- NEET (UG) - 2024
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The velocity (v) - time (t) plot of the motion of a body is shown below :
The acceleration (a) - time(t) graph that best suits this motion is :
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The following graph represents the T-V curves of an ideal gas ( where T is the temperature and V the volume) at three pressures P1, P2 and P3 compared with those of Charles's law represented as dotted lines.
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Concepts Used:
Pollination and Double Fertilization
Pollination is defined as the pre-fertilization event or process, where pollen grains from another are transferred to the stigma of a flower.
Double fertilization is a complex process that involves the fusion of one female gametophyte with two male gametes.
Types of Pollination:
All plants having flowers completely rely on the pollination method for reproduction. There are 2 types of pollination –
- Self Pollination
- Cross-Pollination
The end products of double fertilization are:
- Diploid Zygote
- Primary Endosperm Nucleus