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From the statements given below, choose ...

From the statements given below, choose the option that are true for a typical female gametophyte of a flowering plant.
(i) It is 8-nucleate and 7-celled at maturity.
(ii) It is free-nuclear during the development.
(iii) It is situated inside the integument but outside the nucellus.
(iv) It has an egg apparatus situated at the chalazal end.

A

(i) and (iv)

B

(ii) and (iii)

C

(i) and (ii)

D

(ii) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
C
Female gametophyte is present inside the nucellus. Egg apparatus is situated at the micropylar end.
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From the statement given below choose the option tht are true for a typical female gametophyte of a flowering plant : (i) It is 8- nucleate and 7-celled at maturity (ii) It is free nuclear during development (iii) It is situated inside the integument but outside the nucellus (iv) It has an egg apparatus situated at the chalazal end.

From the statements given below :- choose option that is true for a tropical female gametophyte of a flowering plant: i. It is -8 nucleate and 7-celled at maturity. ii. In majority of the angiosperms , its monosporic. iii. It is situated inside the integument but outside the nucellus. IV. It had an egg apparatus situated at the micropyle end . V. It develops by mitosis of the 4 cells of megaspore tetrad.

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Some of the statements are given below I. Porifera to Echinodermata lack a notochord. II. Platyhelminthes display tissue level organisation. III. Mesoglea is present in coelenterates during development. IV. Aschelminthes are coelomates. Choose the correct option for true statement.

Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Which of the following statements are correct regarding the development of embryo sac ? (i) The type of nuclear division is free , in which there is no formation of the cell wall . (ii) Out of the eight nuclei , six are surrounded by a cell wall . (iii) Central cell situated below the egg apparatus.

Read the statements below regarding the nucleus of a cell. Identify them as true or false and select the correct combination option. I. The nucleus displays an elaborate nucleoprotein fiber called chromatin during the interphase of the cell cycle. II. The space between the parallel membranes of the nuclear envelope is called the nucleoplasm. III. Nucleus was discovered first by Flemming. IV. The nuclear pores within the nuclear envelope are formed by the fusion of both membranes. {:("No.",I,II,III,IV),(1,"True","True","False","False"),(2,"True","False","False","False"),(3,"True","True","False","False"),(4,"True","False","False","True"):}

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NCERT FINGERTIPS-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
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