At the time of fertilisation in embryo sac b the cell which is in diploid state : 

Monjur Alahi

At the time of fertilisation in embryo sac b the cell which is in diploid state : 

A) Polar nuclei 

B) Zygote 

C) Endosperm 

D) Intra ovular tissue


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Salim Ahmed Kawsar

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(A) Polar nuclei

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The fertilisation which occurs outside the body is 

(A) External fertilisation

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Embryo sac 

B) comprises 7 cells, 8 nuclei

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The name of the part on which pollen tube enters into embryo sac

(C) Micropyle

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The contraceptive which prevents not only fertilisation but also transmitting sexual diseases

(B) Condomes

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Which of the following is necessary for internal fertilisation to occur but NOT necessary for external fertilisation?

(B) The sperm should reach inside the body of the female.

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Identify the animals which undergoes external fertilisation.

Answer is (A) i, ii

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1. A cell is the smallest unit of life. 2. Nerve cell is the longest cell. 3. Prokaryotes were the first form of life on earth

1. True 2. True 3. True 4. True 5. True

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During the development of monosporic development of embryo sac, the nucleus of the functional megaspore divides

(b) Three times

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Explain the significance of meiocytes in a diploid organism.

In a diploid organism, meiocytes undergo meiosis to form haploid gametes. These help to restore 2n (diploidy) through zygote formation or syngamy.

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Name the component cells of the ‘egg apparatus’ in an embryo sac.

Two synergids and an egg.

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