EASY
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Cedrus differs from Eucalyptus in formation of

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Important Questions on Plant Kingdom

MEDIUM

Arrange the following plants with their respective classes in the same order. Sphenopsida, Psilopsida, Pteropsida, Lycopsida, Gnetopsida

A) Selaginella
B) Equisitum
C) Sphagnum
D) Adiantum
E) Psilotum
F) Gnetum

MEDIUM

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.

Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.

In the light of the above statements, choose the correct answer from the options given below:

HARD
Which of the following statements is correct?
MEDIUM
Pinus seed cannot germinate and establish without fungal association. This is because:
MEDIUM
Which of the following statements is incorrect about gymnosperms?
MEDIUM
In which of the following gametophyte is not independent free living?
MEDIUM
Identify the plant that possess all the following characters
A) Xylem and phloem are main conducting elements.
B) Pollen grains are carried by wind.
C) Transfer of pollen is direct.
D) Ovules develop into seeds after fertilisation.
EASY
Winged pollen grains are present in
MEDIUM
Conifers are adapted to tolerate extreme environmental conditions because of:
MEDIUM
Microsporangia of Cycas is formed
EASY
Pinus differs from mango in having:
MEDIUM
Top-shaped multiciliated male gametes and with the mature seeds which bear only one embryo with two cotyledons, are characteristic features of
MEDIUM
Conifers differ from grasses in the
MEDIUM
The 'wing' of Pinus seed is derived from
HARD
In which one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
EASY
The gametophyte is not an independent, free-living generation in:
MEDIUM
In gymnosperms like Pinus and Cycas, the endosperm is