Double fertilisation is exhibited by

(1) gymnosperms

(2) algae

(3) fungi

(4) angiosperms

The world's tallest (angiosperm) flowering tree is

(1) Sequoia

(2) Eucalyptus

(3) Pinus

(4) Cedrus

Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of

(1) Algae

(2) Gymnosperms

(3) Angiosperms

(4) Bryophytes

Which one is correct about male and female gametophyte?

Conifers differ from grasses in the:

1. production of seeds from ovules

2. lack of xylem tracheids

3. absence of pollen tubes

4. formation of endosperm before fertilization

Which one is correct about male and female
gametophyte?
1. In bryophytes and pteridophytes, they have no
independent free-living existence.

2. In bryophytes and angiosperms, they have
free-living existence.

3. In gymnosperms and angiosperms, they have no
independent free-living existence.

4. In bryophytes, pteridophytes and angiosperms,
they have free-living existence

Mark the incorrect match
1. No embryo formation — Polysiphonia.
2. No reduction division in zygote— Polytrichum.
3. Vascular tissue present—Azolla.
4. Pollen directly lands on ovule—Wolffia.

Select the two correct statements out of the four (a-d) given below about gymnosperms.

a. Roots in some non-vascular archegoniate have a fungal association in the form of mycorrhiza

b. Leaves are well adapted to withstand extremes of temperature, humidity and wind

c. Nucellus is protected by ovary wall and the composite structure is called an ovule

d. Multicellular female gametophyte is retained within megasporangium

The correct statements are

(1) a & c               

(2) b & c

(3) c & d              

(4) b & d

Read the following statements (with respect to angiosperms):

(a) Embryo sac formation is preceded by meiosis.

(b) Pollen grains germinate on the ovule and the resulting pollen tube grows through the tissues of stigma and style.

(c) A large group of plants occurring in a wide range of habitats.

(d) Synergids, antipodals, and PEN degenerate after fertilization.

How many of the above statement(s) is/are wrong?

(1) Two

(2) Three

(3) Four               

(4) One

Read the following statements

a. Sporophyte is the dominant, photosynthetic, independent phase of the plant.

b. Highly reduced female gametophyte as embryosac is present in their ovule.

c. The pollen grains are carried in air currents and come in contact with the opening in the ovules.

How many statements are correct for gymnosperms and angiosperms respectively?

1. One and two

2. Zero and three

3. Two and two

4. Three and two