Which one of the following is a characteristic feature of cropland ecosystem?

• Least genetic diversity

• The absence of weeds

• Ecological succession

• Ecological succession

Which is the National Aquatic Animal of India?

• River dolphin

• Blue whale

• Sea-horse

• Sea-horse

Which of the following is the most important cause of animals and plants being driven to extinction?

• Alien species invasion

• Habitat loss and fragmentation

• Co-extinctions

• Co-extinctions

Which one of the following is not used for ex-situ plant conservation?

• Field genebanks

• Seed banks

• Shifting cultivation

• Shifting cultivation

5.

Which of the following represent a maximum number of species among global biodiversity?

• Algae

• Lichens

• Fungi

• Fungi

The species confined lo a particular Region and not found elsewhere is termed as

• Keystone

• Alien

• Endemic

• Endemic

An example of ex-situ conservation is 

• National Park

• Seed bank

• wildlife Sanctuary

• wildlife Sanctuary

A location with luxuriant growth of lichens on the trees indicates that the

• trees are very healthy

• trees are heavily infested

• the location is highly polluted

• the location is highly polluted

Match the following and select the correct option.

• A	B	C	D
  1	2	3	4

• A	B	C	D
  4	1	3	2

• A	B	C	D
  3	2	4	1

• A	B	C	D
  3	2	4	1

A species facing extremely high risk of extinction in the immediate future is called

• Vulnerable 

• endemic

• critically endangered 

• critically endangered