Question

Calculate the no of male gametes formed from a monothecous anther having 15 sporogenous cells in each pollen sac.​

Answer 1

Answer:

3million

Explanation:

L.H.S. = x2 – y2

= (p sec θ + q tan θ)2 – (p tan θ + q sec θ)2

= p2 sec θ + q2 tan2 θ + 2 pq sec 2 tan 2 -(p2 tan2 θ + q2 sec2 θ + 2pq sec θ tan θ)

= p2 sec θ + 2 tan2 θ + 2pq sec θ tan θ – p2 tan2 θ – q2 sec θ – 2pq sec θ tan θ

= p2(sec2 θ – tan2 θ) – q2(sec?2 θ – tan2 θ) =

= p2 – q2 …[sec2 θ – tan2 θ = 1

= R.H.S.hii

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Answer 2

Answer:

Total pollen sacs or microsporangia in bilobed dithecous anther =4

Each pollen sac has 100 microspore mother cells.

So total microspore mother cell in 4 pollen sacs=4X100=400

Meiosis produces 4 pollen grains or male gametophytes.

Meiosis in 400 microspore mother cell will produce=400X4=1600 pollen grains or male gametophytes.

So, the correct answer is '16000'

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