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

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

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

Bacteria, fungi, lower plants survive in adverse conditions by

• diapause

• suspended growth

• migration

• formation of thick walled spores.

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 : 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.

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 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