Go through the given diagram of a typical dicot embryo. In which of the following all the 3 parts labelled as A, B, C with their respective functions are correctly identified?

	A	B	C
1.	Plumule, shoot system formation	Radicle, root system formation	Hypophysis, formation of radicle
2.	Plumule, shoot system formation	Radicle, root system formation	Cotyledon, food storage
3.	Radicle, root system formation	Plumule, shoot system formation	Cotyledon, food storage
4.	Radicle, root system formation	Plumule, shoot system formation	Endosperm, food storage

Which of the following is not correct?
(1) As the seed matures, its water content is reduced and seeds become relatively dry(10-15% moisture by mass)

(2) The seed dormancy is the internal or innate inhibition of generation of normal or viable seeds

(3) Embryo in dormant seed shows higher rate of general metabolic rate

(4) Because of dormancy seeds remain viable for longer period and can be stored

Which of the following statements is false?
 

Hybrid seeds have to be produced every year because:
(1) Hybrid plants become sterile in coming years

(2) They show more heterosis in coming years

(3) Hybrid vigour is not maintained beyond one generation as segregation of genes begins in the second generation

(4) Hybrid seed industry tends to increase cost of the seeds

Active research is going on in many laboratories around the world to understand the genetics of apomixis. What is the purpose of such active research?
(1) Hybrid plants are directly formed by apomixis

(2) Apomixis is the method to produce seed without fertilization

(3) To transfer apomictic genes into hybrid varieties which will prevent loss of hybrid vigour with successive years

(4) Apomixis produces genetically different individuals

Both, autogamy and geitonogamy are prevented in:

(1) Papaya           

(2) Cucumber       

(3) Castor             

(4) Maize

A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by :
1. A longitudinal groove running lengthwise.
2. A longitudinal groove running breadth wise.
3. A transverse groove running breadth wise.
4. A transverse groove running lengthwise.

Four statements are given below. How many of them are correct?
(1) The anther is a tetragonal structure, with four microsporangia at corners, two in each lobe.
(2) Microsporangia develops further and becomes a pollen sacs.
(3) A typical microsporangia is surrounded by four layered wall, 3-protective and 1 nutritional.
(4) The nutritive layer is densely cytoplasmic with more than one nucleus

Options :

1. 3                         
2. 4
3. 2                         
4. 1

Which of the following statement is not correct for pollen grain?
1. It represents male gametophyte.
2. It is a spherical structure, about 25-50 micrometers in diameter.
3. Pollen grains are rich in nutrients.
4. In family rosaceae, leguminoseae and solanaceae pollen lose viability in 30 minute.

In which organ the growth of pollen tube is observed, till it reaches the ovules?

A.Pollen tube

B.Style

C.Ovary

D.Stigma