The egg apparatus is made up of two ________ and one ________ at the ________ end of the embryo sac.

(1) antipodals, egg cell, micropylar

(2) synergids, egg cell, chalazal

(3) egg cells, synergids, chalazal

(4) synergids, egg cells, micropylar

How many of the nuclei in the female gametophyte in angiosperms are surrounded by cell wall?

(1) 5

(2) 6

(3) 7

(4) 8

A fertilized embryo sac of an angiosperm contains:

I. Haploid cells

II. Diploid cells

III. Triploid cells

1. I and II only

2. I and II only

3. II and III only

4. I, II and III

In the monosporic embryo sac of a flowering plant, the number of nuclei that get surrounded by cell walls and thus are organized into cells is:

1. 5

2. 6

3. 7

4. 8

Functional megaspore in an angiosperm develops into

(1) ovule

(2) endosperm

(3) embryo sac

(4) embryo

In majority of angiosperms

(1) egg has a filiform apparatus

(2) there are numerous antipodal cells

(3) reduction division occurs in the megaspore mother cells

(4) a small central cell is present in the embryo sac

Filiform apparatus is characteristic feature of

1. generative cell

2. nucellar embryo

3. aleurone cell

4. synergids

Function of filiform apparatus is to 

(1) recognise the suitable pollen at stigma

(2) stimulate division of generative cell

(3) produce nectar

(4) guide the entry of pollen tube

Which one of the following pairs of plant strucutre has haploid number of chromosomes?

(1) Megaspore mother cell and antipodal cells

(2) Egg cell and antipodal cells

(3) Nucellus and antipodal cells

(4) Egg nucleus and secondary nucleus

What does the filiform apparatus do at the entrance into ovule?

1. It helps in the entry of pollen tube into a synergid

2. It prevents entry of more than one pollen tube into the embryo sac

3. It brings about opening of the pollen tube

4. It guides pollen tube from a synergid to egg