CBSE
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.
The Great Barrier Reef along the east coast of Australia can be categorised as
population
community
ecosystem
biome.
Which animal has gone extinct in recent times in India
Acinonyx jubatus
Antilope cervicapra
Rhinocerus unicornis
Panthera leo
One of the ex situ conservation methods for endangered species is
wildlife sanctuaries
biosphere reserves
cryopreservation
national parks
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.
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.
Beta diversity is diversity
in a community
between communities
in a mountain gradient
on a plain
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
Which one of the following pairs of geographical areas show maximum biodiversity in our country?
Sunderbans and Rann of Kutch
Eastern Ghats and West Bengal
Eastern Himalaya and Western Ghats
Kerala and Punjab
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
