Advantage of cleistogamy is

A no dependence on pollinators
B vivipary
C higher genetic variability
D more vigorous offspring.

Verified Solution

Answer & Solution

Correct Answer

(A) no dependence on pollinators

Step-by-step Solution

Detailed explanation

(a) : Cleistogamy is the process of pollination and fertilization before the flower has opened. In such flowers, the anther and stigma lie close to each other. When anthers dehisce in the flower buds, pollen grains come in contact with the stigma to effect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of crosspollen landing on the stigma. Cleistogamous flowers produce assured seedset even in the absence of pollinators.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the plant with the kind of life cycle it exhibits:

List-I	List - II
\((a)\) Spirogyra	\((i)\) Dominant diploid sporophyte vascular plant, with highly reduced male or female gametophyte
\((b)\) Fern	\((ii)\) Dominant haploid free-living gametophyte
\((c)\) Funaria	\((iii)\) Dominant diploid sporophyte alternating with reduced gametophyte called prothallus
\((d)\) Cycas	\((iv)\) Dominant haploid leafy gametophyte alternating with partially dependent

Choose the correct answer from the options given below:

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List \(I\)	List \(II\)
\(A\) Typhoid	\(I\) Fungus
\(B\) Leishmaniasis	\(II\) Nematode
\(C\) Ringworm	\(III\) Protozoa
\(D\) Filariasis	\(IV\) Bacteria

Column \(- I\)	Column \(- II\)
\((a)\) Typhoid	\((i)\) Wuchereria
\((b)\) Pneumonia	\((ii)\) Plasmodium
\((c)\) Filariasis	\((iii)\) Salmonella
\((d)\) Malaria	\((iv)\) Haemophilus