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Q. No.Double fertilisation is exhibited by
(1) gymnosperms
(2) algae
(3) fungi
(4) angiosperms
Difficulty Level:
Life cycle of Ectocarpus and Fucus respectively are
(1) Haplontic, Diplontic
(2) Diplontic, Haplodiplontic
(3) Haplodiplontic, Diplontic
(4) Haplodiplontic, Haplontic
Difficulty Level:
Conifers are adapted to tolerate extreme environmental conditions because of
(1) broad hardy leaves
(2) superficial stomata
(3) thick cuticle
(4) the presence of vessels
Difficulty Level:
Which one of the following statements is wrong?
(1) Algae increases the level of dissolved oxygen in the immediate environment
(2) Algin is obtained from red algae and carrageen from brown algae
(3) Agar-agar is obtained from Gelidium and Gracilaria
(4) Laminaria and Sargassum are used as food
Difficulty Level:
In bryophytes and pteriodophytes, transport of male gametes requires
1. insects
2. birds
3. water
4. wind
Difficulty Level:
Select the correct statement.
(1) Salvinia, Ginkgo and Pinus all are gymnosperms
(2) Sequoia is one of the tallest trees
(3) The leaves of gymnosperms are not well adapted to extremes of climate
(4) Gymnosperms are both homosporous and heterosporous
Difficulty Level:
Chromatophores take part in
(1) photosynthesis
(2) growth
(3) movement
(4) respiration
Difficulty Level:
Which one of the following shows isogamy with non-flagellated gametes?
(1) Sargassum
(2) Ectocarpus
(3) Ulothrix
(4) Spirogyra
Difficulty Level:
Which of the following is responsible for peat formation?
(1) Marchantia
(2) Riccia
(3) Funaria
(4) Sphagnum
Difficulty Level:
Male gametophyte with least number of cells is
(1) Pteris
(2) Funaria
(3) Lilium
(4) Pinus
Difficulty Level:
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