CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Microsporogenesis

In angiosperm...

Question

In angiosperm, all 4 microspores of tetrad are covered by a layer which is formed by

A

Callose

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Cellulose

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Sporopollenin

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Pectocellulose

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Callose
Callose wall surrounds the sporocytes during the meiotic stage. It provides an isolation barrier sealing off one meiotic cell (megaspore mother cell) from another. Hence it acts as a molecular filter isolating the developing microspores from the influence of the surrounding diploid tissue or sister spores. Thus the correct answer is option A.

Suggest Corrections

thumbs-up

0

Similar questions

Q. In angiosperms, all the four microspore of tetrad are formed from PMC by:

Q. The microspore tetrad of angiosperm at the time of formation, are surrounded by a callose wall. Breakdown of this wall is brought about by the enzyme callase synthesized by the:

Q. Assertion :In most angiosperms, microspores of a tetrad grow and separate from one another shortly after meiosis. Reason: In the members of families Orchidaceae and Asclepiadaceae, all the pollen grains of a sporangium remain united to form a compact structure called pollinium.

Q. Based on the given excerpt, answer the given question.

Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

Match the labels with their correct description in the given diagram of microsporangium showing different layers of its wall.
[1 mark]

Q. Based on the given excerpt, answer the given question.

Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

A dithecous anther is __________.
[1 mark]

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Male Reproductive Part

BIOLOGY

Watch in App

explore_more_icon

Explore more

Microsporogenesis

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon