How many haploid cells are present in a mature female gametophyte of a flowering plant? Name them.

Write the importance of bagging of unisexual flowers in a crop improvement programme.

Name the parts of pistil which develop into fruits and seeds

A single pea plant in your kitchen garden produces pods with viable seeds, but the individual papaya plant does not. Explain.

(a) Give one example each of albuminous and non-albuminous seeds.
(b) Name the parts of the ovule and the embryo sac of an angiosperm that develop into
(i) perisperm,
(ii) seed coat,
(iii) endosperm, and
(iv) embryonal axis.

Write the differences between male and female gametophyte.

Name the two end products of double fertilisation in angiosperms. How are they formed? Write their fate during the development of seed.

Insect-pollinated flowers are characterized by

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

In a type of apomixis known as adventive embryology, embryos develop directly from the

Does ornithophily refer to the pollination by which of the following?

Which one of the following pollinations is autogamous?

Match the following columns.

Kanchan went to a garden and saw some flower which were closed.She assumed that those flowers must be buds.But she was astonished to see that all the flower were closed and neither of them were open.
She was confused and asked her queries to her teacher.
(i)What do you think,are there any plants with closer flower?Give an example
(ii)Are such plants pollinated?Explain.
(iii)What are such flowers/plants called?
(iv)What values are shown by Kanchan?

Trace the development of a 2-celled pollen grain of an angiosperm within an anther. Draw a labelled diagram to substantiate your answer.

Identify the types of flowers A and B on the Commelina plant shown above.
(b) Mention the type(s) of pollination that can occur in each of them.

Assertion: Perisperm is protective covering of seed and helps in dispersal and nutrition.
Reason: Pericarp is covering of fruit which is non-functional.
Codes :
(a) Both assertion and reason are true and reason is the correct explanation of assertion
(b) Both assertion and reason are true but reason is not the correct explanation of assertion
(c) Assertion is true but reason is false
(d) Both assertion and reason are false

Assertion (A) : Embryo sac development is monosporic in Polygonum.
Reason (R) : In this development, only one functional megaspore is present at chalazal end.
(a) If both A and R are true and R is correct explanation of A
(b) If both A and R are true, but R is not the correct explanation of A
(c) If A is true, but R is false
(d) If A is false, but R is true