Multiple Choice QuestionsHow 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
A.
If both assertion and reason are true and reason is the correct explanation of assertion
Conifer or Pinus is a heterosporous plant producing mega and microspores inside megasporangium and micro-sporangium respectively. Each microsporangium is small, sessile and elongated sac like structure having two layered wall. Inside the wall, lie tapetum which is a nourishing layer. Also, inside the cavity, there are large number of dusty and two winged microspores present. On maturity the microsporangium wall bursts from the upper side forming a longitudinal slit. A large number of yellow pollen grains are liberated which are carried by wind due to the presence of wings.
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 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
Mossess and ferns are found in moist and shady places because both
require presence of water for fertilization
do not need sunlight for photosynthesis
depend for their nutrition on microorganisms which can survive only at low temperature
cannot compete with sun-loving plants.
People recovering from long illness are often advised to include the alga Spirulina in their diet because it
makes the food easy to digest
is rich in proteins
has antibiotic properties
restores the intestinal microtlora
Azolla is used as a biofertilizer because it
multiplies very fast to produce massive biomass
has association of nitrogen - fixing Rhizobium
has association of nitrogen - fixing cyanobacteria
has association of mycorrhiza
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