EASY
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The pollen chamber in gymnosperms refers to

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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
Pinus seed cannot germinate and establish without fungal association. This is because:
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.
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:

EASY
Winged pollen grains are present in
MEDIUM
Conifers are adapted to tolerate extreme environmental conditions because of:
MEDIUM
Which of the following statements is incorrect about gymnosperms?
MEDIUM
In which of the following gametophyte is not independent free living?
HARD
Which of the following statements is correct?
MEDIUM
Conifers differ from grasses in the -------------------------.
EASY

Fill in the blank with the correct option provided in the bracket.

Cones represent the _____(reproductive/photosynthetic) organs amongst gymnosperms. 

EASY
In which one of the following, male and  female gametophytes do not have free living independent existence ?
MEDIUM
Which of the following does not have an independent free-living gametophyte?
EASY
Spirally arranged _____ constitute a cone.
MEDIUM
In Pinus gymnosperms, the haploid structures are
MEDIUM
An association between roots of higher plants and fungi is called
EASY
Top-shaped multiciliated male gametes, and the mature seed which bears only one embryo with two cotyledons, are characteristic features of