Structure of Megasporangium

Q.

With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q. In a fertilized ovule n, 2n and 3n conditions occur respectively in:

1. Antipodal, nucellus and endosperm
2. Megaspore mother cell, nucellus and endosperm
3. Egg, nucellus and microspore
4. Endosperm, micropyle and egg

Q.

The body of the ovule is fused within the funicle at

1. Nucellus

2. Chalaza

3. Hilum

4. Micropyle

Q. After fertilisation the outer integument of ovule changes into

1. testa
2. tegmen
3. fruit
4. seed

Q. Megaspore mother cell is present in the of the nucellus.

1. Chalazal end
2. micropylar end
3. stigma
4. ovary

Q. Which of the following statements is incorrect with respect to a typical anatropous ovule?

1. The stalk of the ovule is called funicle.
2. Micropyle is situated opposite to the basal part of the ovule.
3. Hilum is a small opening on the surface of an ovule.
4. The mass of cells enclosed within the integuments is called nucellus.

Q. Hilum is the junction between ovule and _______ .

1. funicle
2. micropyle
3. nucellus
4. integument

Q.

___________ represents the junction between ovule and funicle.

Q. Nucellus is made up of which type of cells?

1. Parenchyma cells
2. Sclerenchyma cells
3. Collenchyma cells
4. None of these

Q.

The placenta is attached to the developing seed near the

(a) testa (b) hilum (c) micropyle (d) chalaza

Q. The mass of the parenchymatous cell which fills the body of the ovule is:

1. Micropyle
2. Nucellus
3. Chalaza
4. Hilum

Q. Which of the following types of ovules has the micropyle directed in the downward direction?

1. Orthotropous ovule
2. Hemianatropous ovule
3. Circinotropous ovule
4. Anatropous ovule

Q. Read the following statements regarding bryophytes and select the correct answer.
(i) Bryophytes lack true roots, stem and leaves.
(ii) The main plant body is a haploid.
(iii) Sex-organs are unicellular and non-jacketed.
(iv) Fertilization produces an embryo in water.

1. Statements (i) and (ii) are correct
2. Statements (ii) and (iii) are correct
3. Statements (iii) and (iv) are correct
4. All statements are correct

Q. Stalk with which ovules remain attached to the placenta is

1. Funicle
2. Raphe
3. Hilum
4. Chalaza

Q. Megasporangium is equivalent to:

1. Ovule
2. Megaspore mother cell
3. Egg cell
4. Megaspore

Q.

Female gametophyte in flowering plants refers to

a ovule b nucellus c embryosac d gynoecium

I'm confused regarding answer..please answer this with explanation

Q. From fifty megaspore mother cells, the number of eggs produced are

1. 50
2. 25
3. 200
4. 100

Q. An ovule is attached to the placenta by a stalk like structure called .

1. hilum
2. funicle
3. chalaza
4. micropyle

Q.

What is meant by monosporic development of female gametophyte?

Q. Hilum is the junction between ovule and _______ .

1. funicle
2. micropyle
3. nucellus
4. integument

Q.

The ovule of an angiosperm is technically equivalent to :

1. Megaspore mother cell

2. Megasporangium

3. Megasporophyll

4. Megaspore

Q. Match the parts of gynoecium given in column I with their definition given in column II. Choose the correct combination from the options given below.

1. A – IV; B – II; C – I; D – III; E – V
2. A – V; B – IV; C – III; D – II; E – I
3. A – I; B – III; C – V; D – II; E – IV
4. A – I; B – II; C – III; D – IV; E – V

Q.

What is microsporangium and microsporum?

Q. Choose the correct option:

Column I	Column II
A. Funicle	I. Small opening of ovule
B. Integuments	II. Stalk of ovule
C. Chalaza	III. Protective envelope
D. Hilum	IV. Junction part of ovule and stalk
E. Micropyle	V. Base of ovule

1. A-II, B-III, C-V, D-IV, E-I
2. A-I, B-III, C-II, D-IV, E-V
3. A-II, B-III, C-I, D-IV, E-V
4. A-III, B-IV, C-V, D-I, E-II

Q. Ovule with hilum lying close to micropyle is known as:

1. Anatropous
2. Circinotropous
3. Atropous
4. All of the above

Q. Post fertilisation the integuments in the ovule gets tranformed into ___.

1. Seed
2. Fruit wall
3. Seed coat
4. Cotyledons

Q. Complete the missing links.
Inside the ovary, ovules develop from a special tissue called .

Q.

Arrange the cells in their order of formation during microsporogenesis.

1. Sporogenous tissue - Pollen mother cells - Microspores - Microspore tetrads - Pollen grains

2. Sporogenous tissue - Microspore mother cells - Microspore tetrads - Microspores - Pollen grains

3. Spore mother cells - Pollen tetrads - Pollen grains - Microspores

4. Archesporial cells - Spore mother cells - Spores - Spore tetrads

Q. What is meant by monosporic development of female gametophyte?

Q. Megaspore mother cell is present in the of the nucellus.

1. Chalazal end
2. micropylar end
3. stigma
4. ovary