Multiple Choice QuestionsBacteria, fungi, lower plants survive in adverse conditions by
diapause
suspended growth
migration
formation of thick walled spores.
Which statement is correct regarding mosses
They have dominant and independent sporophyte.
Their antherozoids require water for fertilization.
Their archegonia produce many eggs.
Their antherozoids are multiflagellated
Which of the following statements about Spirogyra is correct?
Lateral conjugation takes place in homothallic species
Scalariform conjugation takes place in homothallic species.
Lateral conjugation takes place in heterothallic species
The type of conjugation is unrelated to homothallic and heterothallic species
Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms.
Perianth and two integuments
Embryo development and apical meristem
Absence of resin duct and leaf venation
Presence of vessel elements and absence of archegonia
How many genome types are present in a typical green plants cell
More than five
More than ten
Two
Three
Assertion : Algae and fungi are classified as thallophytes.
Reason : They both are autotrophs.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Conifer trees produce a large quantity of wind borne pollen grains.
Reason : The pollen grains have wings.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
seed plants showing abnormal forms of growth and development
plants described only in fossil state
plants described in the literature but which Bentham and Hooker did not see in original
a few orders which could not be placed satisfactorily in the classification.
D.
a few orders which could not be placed satisfactorily in the classification.
The system of classification of seed plants presented by Bentham and Hooker, represented. the most well developed classification of natural system.
The classification was published in 3 volumes of Genera plantarum'. The system divided phanerogams or seed plants into 3 classes dicotyledons, gymnospermae and monocotyledons. Dicotyledons were further subdivided into 3 subclasses - polypetalae, gamopetalae and monochlamydae based on the presence or absence of petals and their fusion. They were further divided into series, orders and families. No orders were recognised within monochlamydae and monocotyledons, the series being directly divided into families. But the system had a lot of demerits within it. He did not know the affinities of the families placed under 'Ordines anomate' and the families were tentativily grouped together. So, a few orders were not placed satisfactorily in the classification. Monochlamydae is an unnatural assemblage of taxa, which belongs elsewhere. The creation of this group has resulted in the separation of many closely related families
Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?
Prosopis, tree, scrub
Saccharum, grass, forest
Shorea robusta, herb, tropical rain forest
Acacia catechu, tree, coniferous forest
Which one of the following categories of organisms do not evolve oxygen during photosynthesis
Red algae
Photosynthetic bacteria
C4 plants with Kranz anatomy
Blue green algae
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