Biology Test 17...

Read the following five statements (A-E) and answer as asked next to them :-

(A) A typical anther is a unilobed structure consisting of two pollen sacs.

(B) Each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad.

(C) Sporopollenin is one of the most resistant inorganic material known.

(D) Elongated internode between corolla and androecium is called anthophore

(E) The inner most layer of microsporangia is tapetum, it nourishes the developing pollen grains.

How many of the above statements are correct?

How many nucleus participate in triple fusion?

Fusion of male gamete with egg cell of embryosac is known as :

In which plant, chalazogamy is present :

(a) An axis is present between the plumule and radicle which is known as tigellum

(b) Cellular endosperm is the edible portion in coconut

(c) Generally chalazal megaspore will persist and later on embryo also develops at the chalazal end of embryosac.

Choose the correct statements : 

Given below a L.S. of an embryo of grass. Identify the labelled part (a), (b), (c) and (d) and select correct option about them :-

Select the correct identification of the 'A' in the diagram-

The ploidy of endosperm in Capsella is ?

Perisperm is the -

Which one of the following structure found in dicot seed will be genetically identical with it's maternal plant?