HARD
Earn 100
How many of the following feature(s) is/are common in both Pinus and Cycas?
a. Pinnate leaves
b. Mycorrhiza
c. Branched stem
d. Pollination by air current
e. Female strobili
f. Non-motile sperms
g. Simple leaves
h. Exposed ovule
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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:
EASY
MEDIUM
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Xylem and phloem are main conducting elements.
Pollen grains are carried by wind.
Transfer of pollen is direct.
Ovules develop into seeds after fertilisation.
HARD
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EASY
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EASY
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B. Stem branches are monomorphic in Pinus.
C. Wood is monoxylic and manoxylic in Pinus.
