BIO 101 | Study Mode

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Question 141
A
Cycas
B
angiosperm
C
Selaginella
D
moos
Explanation
Moss has the largest gametophyte. Mosses are small, soft plants that are typically 1-10 cm tall, some species are much larger. They commonly grow close together in clumps or mats in damp or shady locations. They do not have flowers or seeds and their simple leaves cover the thin wiry stem.

Correct option: D
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Question 142
A
they require a layer of water for carrying out sexual reproduction
B
they occur in damp places
C
they are mostly aquatic
D
all the above.
Explanation
Bryophytes are called the amphibians because they require a layer of water for carrying out sexual reproduction. They grow in the moist places on land but they require water during the time of fertilization i.e. for completion of life cycle.

Correct option: A
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Question 143
A
Pinus
B
Selaginella
C
Chlamydomonas
D
Dryopteris.
Explanation
A plant in which sporophytic generation is represented by zygote is Chlamydomonas. It is a type of algae that has gametophytic plant body (haploid). It reproduces sexually by gametes which are isogametes that fuse to produce diploid zygote which is the only sporophytic generation.

Correct option: C
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Question 144
A
pteridophyta
B
rhodophyta
C
bryophyta
D
phaeophyta.
Explanation
Bryophytes are the plants which produces spores and embryos but they do not have vascular tissue system. While rhodophytes and phaeophytes are algae and produces spores (no embryos) only and pteridophytes produces spores, embryo and well developed vascular tissue system.

Correct option: C
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Question 145
A
archegonium
B
embryo
C
flagellate sperms
D
roots.
Explanation
Root is not common between Funaria and Selaginella. Funaria is a bryophyte and have archegonium, embryo, flagellated sperms which are also present in Selaginella. Selaginella is a pteridophyte and it has root which is absent in Funaria.

Correct option: D
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Question 146
A
pteridophytes
B
mosses
C
ferns
D
gymnosperms.
Explanation
A plant having seed but lacking flowers and fruit belongs to gymnosperms. Gymnosperms are vascular land plants and bears seeds which are naked i.e., ovules not enclosed in the ovary. Hence, flowers are absent.

Correct option: D
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Question 147
A
12
B
18
C
6
D
24
Explanation
In Pinus, if the pollen grain has 6 chromosomes then in its endosperm will also have 6 chromosomes as endosperm and pollen grains are both haploid structures.

Correct option: C
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Question 148
A
Cycas
B
Pinus
C
Cedrus
D
Abies.
Explanation
Resins and turpentine is obtained from Pinus which is gymnospermic plant. Cycas is a ornamental plant. Paper and Canada balsam is obtained from Abies and timber is obtained from Cedrus deodara.

Correct option: B
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Question 149
A
angiospermous wood
B
bryophytes
C
gymnospermous wood
D
ferns.
Explanation
Turpentine is commercially very important. It is obtained from Pinus which is a member of gymnosperm. It is obtained from Abies balsamea.

Correct option: C
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Question 150
A
independent gametophyte
B
well developed vascular system
C
archegonia
D
flagellate spermatozoids.
Explanation
Pteridophytes differ from mosses/bryophytes in having well developed vascular tissue system. In mosses/ bryophytes vascular tissue is absent.

Correct option: B

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