Microsporogenesis

Q. Total number of meiotic divisions required for forming 100 zygotes or 100 grains of wheat is

1. 100
2. 50
3. 75
4. 125

Q.

Arrange the following terms in the correct developmental sequence

Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes.

Q.

If each microsporangium contain 75 pollen mother cells, what is the maximum number of pollen grains produced by a Datura flower?

1. 1200

2. 6000

3. 3000

4. 300

Q. If the number of chromosomes present in a pollen mother cell (PMC) is 48, then the number of chromosomes present in the microspore is____.

1. 24
2. 48
3. 56
4. 12

Q.

Explain the different processes involved in karyokinesis?

Q.

In angiosperms, all the four microspore tetrads are covered by a layer that is formed by.

1. Callose

2. Pectose

3. Sporopollenin

4. Cellulose

Q. Select the option depicting the correct order of development in an anther.

1. Pollen grain$\to$ sporogenous tissue $\to$ microspore $\to$ pollen mother cell
2. Sporogenous tissue $\to$ pollen mother cell $\to$ microspore $\to$ pollen grain
3. Sporogenous tissue $\to$ microspore $\to$male gametes $\to$ pollen grain
4. Sporogenous tissue $\to$ male gametes $\to$pollen mother cell $\to$ pollen grain

Q.

Which one of the following is the real difference between Marchantia and Funaria?

1. The main plant body of Marchantia is haploid but that of Funaria is diploid.

2. In Marchantia the sporophyte is not distinguished into foot, seta and capsule unlike Funaria.

3. In Marchantia sporophyte is dependent on gametophyte whereas in Funaria it is independent.

4. In Marchantia spores develop into adult gametophyte but in Funaria they develop into a juvenile filamentous gametophyte.

Q.

If there are 4 cells in anthers, what will be the number of pollen grains?

1. 12

2. 16

3. 4

4. 8

Q. Plant belonging to class Sphenopsida is

1. Selaginella

2. Dryopteris
3. Equisetum
4. Adiantum

Q.

Which part of the flowering plant contains sporogenous tissue.

1. Stamen

2. Pollen

3. Microspores

4. Young anthers

Q. Which among the following is diploid?

1. Microspore
2. Pollen mother cell
3. Pollen grain
4. Both b and c

Q.

An anther has 1200 pollen grains.How many pollen mother cells must have been there to produce them?

1200

300

150

2400

I need the explanation too:)

Q.

The pericarp of the fruit develops from

1. Ovary wall

2. Endosperm

3. Tapetum

4. Epidermis

Q.

Question 20

An anther has 1200 pollen grains. How many pollen mother cells must have been there to produce them?

Q. Which of the following pairs have haploid structures?

1. Antipodal cells and egg cell
2. Nucellus and antipodal cells
3. Nucellus and primary endosperm nucleus
4. Antipodal cells and megaspore mother cell

Q. What is true for wall of pollen sac?

1. Endothecium occurs inner to stomium
2. Tapetum lies below the endothecium
3. Middle layers occur below the epidermis and outside the tapetum
4. Middle layers lie between endothecium and tapetum.

Q. Implantation is the process of__________.

1. attachment of blastocyst to the uterine wall
2. egg movement
3. fusion of male and female gametes
4. both b and c

Q.

Arrange the following terms in the correct developmental sequence:

Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes

Q.

Meiotic division of a cell results in formation of four daughter cells.

1. False

2. True

Q.

Choose incorrect statement about pinus

A. Male and female strobili may be produced on the same tree

B. Male and female strobili may be produced on different tree

C. Sporophyte is the dominant plant body

D. A reduced gametophyte is seen

Q.

Number of male gametes in the growing pollen tube is

1. One

2. Two

3. Three

4. Seven

Q. Top shaped multiciliated male gametes and mature seeds with one embryo having two cotyledon are characteristic features of

1. Cycas
   
2. Conifers
   
3. Gamopetalous angiosperm
   
4. Polypetalous angiosperms
   

Q.

How many meiotic divisions of the pollen mother cell (PMC) are required to produce 1000 pollen grains?

1. 200

2. 100

3. 250

4. 500

Q.

Which of the following is NOT correct regarding a pollen grain.

1. Germ pores are regions in exine that lack exine and sporopollenin.

2. Hard outer layer of pollen is called Exine

3. There are no pores present on exine.

4. Sporopollenin is a material highly resistant to strong acids.

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. A pteridophyte which fixes nitrogenwith the assistance of blue-green algae is:

1. Azolla
2. Salvinia
3. Pteris
4. Selaginella

Q.

The process of reduction division of __ tissue is termed microsporogenesis.

Q.

If each microsporangium contains 75 pollen mother cells (PMCs), what is the maximum number of pollen grains produced by a Datura flower?

1. 300

2. 1200

3. 6000

4. 3000

Q. The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gemete produced by the plant?

1. 4
2. 14
3. 56
4. 28