Pollen Germination

Q.

What's meant by cellular totipotency

Q.

Define vernalization.

Q. What is insementation

Q. How do birds reproduce?,

Q.

Which of the following is an example of bisporic embryo sac?

1. Peperomia

2. Polygonum

3. Allium

4. None of the above

Q.

Union of male and female gametes forms

1. Egg

2. Embryo

3. Zygote

4. Spore

Q.

Endosperm of angiosperms forms after fertilization from

1. Synergids

2. Zygote

3. Antipodal cells

4. Secondary nucleus

Q.

How many pollen mother cells should undergo meiotic division to produce 64 pollen grains?

1. 8

2. 16

3. 24

4. 32

Q.

Which of the following statements is/are true for sexual reproduction in plants?

(i) Plants are obtained from seeds.

(ii) Two plants are always essential.

(iii) Fertilization can occur only after pollination.

(iv) Only insects are agents of pollination.

1. (i) and (iii)

2. (ii) only

3. (iv) only

Q.

Pollen grains germinate only if it falls on the stigma of the same plant species or else it disintegrates.

1. True

2. False

Q.

Are pollen grains dehydrated microspores?

Q.

In an angiosperm, the ovary develops after fertilisation into____i____ and______ii_____ develops into seeds.

The information in which alternative completes the given statement?

Q. A unisexual flower that has only stamens is called _________.

1. Incomplete flower
   
2. Complete flower
   
3. Pistillate flower
   
4. Staminate flower

Q.

What Is the purpose of synergids in an Ovule?

Q.

Which of the following is the site of fertilisation in humans?

1. Moth

2. Tadpole

3. Fly

4. Pupa

Q.

Fusogenic agent used for somatic hybridization is ______.

1. PEG

2. Auxin

3. Cytokinin

4. Agar

Q.

Question 02
Describe the process of fertilization in human beings.

Q.

Where do the synergids come from?

Q.

Is fertilization essential for the formation of fruits in Angiosperms?

Q.

In external fertilisation, complete development of the embryo takes place ___________.

1. inside the female body

2. outside the female body

3. no embryo formation

4. inside the male body

Q. What is double fertilization? Describe the process in brief.

Q.

Name the following
The process in which the male gamete presents in pollen grain fuse (join) with the female gamete present in ovule to form a new cell called zygote.

Q. How many meiotic divisions are required for the formation of $100$ pollen grains?

1. $50$
2. $25$
3. $100$
4. $26$

Q. What is hidden reproductive organ this word has been used for Cryptogamae.and if there is hidden reproductive organ then how can naked embryo will be there bcz embryo r those which takes place after the fertilization so if there is hidden reproductive organ then there will be no embryo but it has been written that thallophytes , the bryophytes and the pteridophytes have naked embryos

Q.

Question 2
In a flower, the parts that produce male and female gametes (germ cells) are

(a) stamen and anther
(b) filament and stigma
(c) anther and ovary
(d) stamen and style

Q. What is the function of the synergids?

Q. Very Short Answer Types :
How many meiotic divisions are necessary to produce 100 pollen grains?

Q.

Label the parts A, B, C, and D for the given image.

​

1. A. Ovule, B. Central cell, C. Nucellus, D. Embryo sac

2. A. Central cell, B. Nucellus, C. Embryo sac, D. Ovule

3. A. Ovule, B. Nucellus, C. Embryo sac, D. Central cell

4. A. Ovule, B. Nucellus, C. Central cell, D. Embryo sac

Q. Select the correct statements regarding the structure of a mature embryo sac.

1. (a), (b) and (c)
2. (b), (c) and d
3. Only (a) and (c)
4. (a), (c) and (d)

Q. A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be _______________.

1. Tetraploid
2. Triploid
3. Diploid
4. Pentaploid