નીચેનામાંથી કયું વિધાન સાચું છે?

A એનોથેસીયમ (તંતુમયસ્તર) લઘુબીજાણુઓ ઉત્પન્ન કરે છે.
B પોષકસ્તર વિકાસ પામતી પરાગરજને પોષણ આપે છે.
C પરાગરજના બહારના સખત આવરણને અંત આવરણ કહે છે.
D બીજાણુજનક પેશી એ એકકીય હોય છે.

Verified Solution

Answer & Solution

Correct Answer

(B) પોષકસ્તર વિકાસ પામતી પરાગરજને પોષણ આપે છે.

Step-by-step Solution

Detailed explanation

(b) : A microsporangium is generally surrounded by four wall layers -the epidermis, endothecium, middle layers and the tapetum. The outer three wall layers perfom the function of protection and help in dehiscence of anther to release the pollen. The innermost wall layer is the tapetum. It nourishes the developing pollen grains. Cells of the tapetum are food rich and possess dense cytoplasm and generally have more than one nucleus. They disintegrate to liberate the contents which is absorbed by the developing spores.

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.

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