MHT CET · BIOLOGY · STD 12 - 1. Reproduction in Lower and Higher Plants

If there are 1280 microspores in a tetralocular anther, how many microspore mother cells will be there in its each pollen chamber?

A 80
B 160
C 240
D 1280

Verified Solution

Answer & Solution

Correct Answer

(A) 80

Step-by-step Solution

Detailed explanation

A tetralocular anther consists of four pollen chambers. Since there are 1280 microspores in the anther, No. of microspores in each chamber
\(=\frac{1280}{4}=320\)
1 microspore mother cell (2n) undergoes meiosis to form four haploid microspores (n). No. of microspore mother cells (MMCs) needed to produce 320 microspores.
\(=\frac{320}{4}=80\)
80 MMCs are present in each chamber.

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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i.	Cenozoic	2-65 mya	Origin of vertebrates
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