When the filament runs throughout the length of anther, it is called

• adnate

• dorsi fixed

• versatile

• syngenesious

Assertion : The megaspore mother cell undergoes mitosis to produce four megaspores.

Reason : Megaspore mother cells and the megaspores are both haploid.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both the assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both the assertion and reason are false.

Assertion : The two cotyledons in the seed are often referred to as the embryonic leaves.

Reason : The embryo contains radicle and plumule.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both the assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both the assertion and reason are false.

324.

During formation of which of the following free nuclear division occurs?

• Flower

• Endosperm

• Gametes

• Fruit

Which of the following feature(s) is/are common to both wind and water pollinated flowers?

I. Pollen grains are long and ribbon-like.

II. Stigma is large and feathery.

III. The flowers are not colourful.

IV. The flowers do not produce nectar.

• III and IV only

• II and III only

• I and II only

• II only

• II only

Select the plants pollinated by water

(A) Water hyacinth

(B) Zostera

(C) Amorphophallus

(D) Vallisneria

(E) Yucca

• (A), (D) and (E) only

• (B) and (E) only

• (B) and (D) only

• (B), (C) and (D) only

• (B), (C) and (D) only

Consider the following statements and choose the correct option

(A) The ovule is attached to the placenta by means of a stalk called filament

(B) The ovule fuses with the stalk in the region called hilum

(C) The two protective envelopes of ovule are called integuments

(D) The small opening in the tip of ovule is called germ pore

Of the above statements

• (A) and (D) are correct

• (A) and (C) are correct

• (B) and (D) are correct

• (B) and (C) are correct

• (B) and (C) are correct

Which one of the following is considered important in the development of seed habit?

• Homospory

• Heterospory

• Dependent sporophyte

• Free living gametophyte

• Free living gametophyte

The residual persistent nucellus in the seed of black pepper and beet is called

• Perisperm

• Endosperm

• Pericarp

• Scutellum

• Scutellum

Consider the following statements with respect to flowering plants

(A) The pollen grains represent the male gametes

(B) The functional megaspore developing into the embryo sac represent the female gamete

(C) Transfer of pollen grains from anther to the stigma of different plant is known as xenogamy

(D) Transfer of pollen grains from anther to the stigma of another flower of the same plant is known as geitonogamy

Of the above statements

• (A) and (B) alone are correct

• (A) and (C) alone are correct

• (A) and (D) alone are correct

• (B) and (C) alone are correct

• (B) and (C) alone are correct