Multiple Choice QuestionsKeystone species deserve protection because these
are capable of surviving in harsh environmental conditions
indicate presence of certain minerals in the soil
have become rare clue to overexploitation
play an important role in supporting other species.
Biosphere reserves differ from National Parks and Wildlife sanctuaries because in the former
human beings are not allowed to enter
people are an integral part of the system
plants are paid greater attention than the animals
living organisms are brought from all over the world and preserved for posterity.
The Great Barrier Reef along the east coast of Australia can be categorised as
population
community
ecosystem
biome.
Which one of the following is a pair of endangered species
Garden lizard and Mexican poppy
Rhesus monkey and Sal tree
Indian peacock and carrot grass
Hornbill and Indian aconite
Assertion: Red algae contribute in producing coral reefs.
Reason: Some red algae secrete and deposit calcium carbonate over their walls.
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 animal has gone extinct in recent times in India
Acinonyx jubatus
Antilope cervicapra
Rhinocerus unicornis
Panthera leo
What is true about cleavage in the fertilized egg in humans
It is meroblastic
It starts while the egg is in fallopian tube
It is identical to normal mitosis
It starts when the egg reaches in uterus
B.
It starts while the egg is in fallopian tube
The development of multi-cellular organisms begins from a single-celled zygote, which undergoes rapid cell division to form the blastula. The rapid, multiple rounds of cell division are termed cleavage. After thecleavage has produced over 100 cells, the embryo is called a blastula. The fertilized egg in humans starts in the fallopian tube (oviduct) during the conduction of zygote towards uterus
Assertion : Tropical rain forests are disappearing fastly from developing countries such as India.
Reason : No value is attached to these forests because these are poor in biodiversity.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
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