15173.If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
Nature of stored food materials in the cell
Types of pigments present in the cell
Chemical composition of the cell wall
Structural organization of thallus
15174.Which cells within the microsporangia undergo meiosis and produce microspores.
Zygotic cells
Spore mother cells
Archegonial cells
Antheridial cells
15176.Assertion: Red algae contribute in producing coral reefs.
Reason: Some red algae secrete and deposit calcium carbonate over their walls.
Reason: Some red algae secrete and deposit calcium carbonate over their walls.
Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.
Both the Assertion and the Reason are true but the Reason is not a correct explanation of Assertion.
Assertion is true but the Reason is false.
Assertion is false but the Reason is true.
15178.A pine seed has cotyledons and tissue from the ______.
Male gametophyte
Female gametophyte
Megasporangium
pollen grain
15181.In a seed-bearing plant the megaspore develops/grows into
Male gametophyte
Female gametophyte
Pollen grain
None of these
15183.Which one of the following in Spirogyra is different based on its nucleus?
Zygospore
Azygospore
Aplanospore
Akinete
15184.The ladder-like structure found in Spirogyra is due to
Scalariform conjugation
Lateral conjugation
Direct conjugation
Asexual reproduction
15185.Besides paddy fields, cyanobacteria are also found inside vegetative part of
Pinus
Cycas
Equisetum
Psilotum
15188.Chlorenchyma develops in
Mycelium of a green mold such as Aspergillus
Cytoplasm of Chlorella
Capsule of a moss
Pollen tube of Pinus
15189.Which of the following plants is used extensively for the study of photosynthesis?
Amaranthus
Asparagus
Chlorella
Sunflower
15192.Compared with the gametophytes of the bryophytes the gametophytes of vascular plants tend to be
Smaller and to have smaller sex organs
Smaller but to have larger sex organs
Larger but to have smaller sex organs
Larger and to have larger sex organs