Which of the following statement is not associated with phenomenon of flowering?

(1) Decision for flowering takes place much before actual flower appears.

(2) During flowering several structural and hormonal changes takes place

(3) During flowering differentiation takes place

(4) Flowering is independent of environmental factors

When anther is young a group of compactly arranged homogenous cells are present in centre it is known as

Match the column with respect to pollen grain:

Find incorrect statement:

Gynoecium of Michelia and Papaver is similar in being

Fossilization of pollen grains is helped by

(1) Compatible protein  

(2) Sporopollenin

(3) Cellulose

(4) Pectin

How many statement(s) is/are correct for pollen grains?
a. Parthenium is a cause of bronhial afflictions
b. Intine exhibits fascinating array of patterns and designs
c. Cytoplasm of pollen grain is s urrounded by spermoderm
d. Generative cell is present when pollens are shed in 40 percent plants.

1. One

2. Two

3. Three

4. Four

Genetically and functionally self-pollination is cent percent ensured with seed formation even in the absence of pollinators by

(1) Bisexuality

(2) Dicliny

(3) Geitonogamy

(4) Cleistogamy

Read the statements and select option representing correct statements with respect to stamen.
A. The distal end of filament is attached to thalamus.
B. A typical anther is dithecous and bisporangiate.
C. Connective is sterile vasculated tissue.
D. Microsporangia develop further and become pollen sacs.

1. A & B

2. A & C

3. B & C

4. C & D

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

A.Pollen tube

B.Style

C.Ovary

D.Stigma