Monadelphous Stamens are those which:

• united into more than two bundles

• united into two bundles

• united into one bundle 

• united into one bundle 

92.

Determination of skin colour is an example of:

• Co-dominance

• polygenic inheritance

• incomplete dominance

• incomplete dominance

'Bt' cotton is resistant to:

• insects

• Draught

• salt

• salt

Haemophilia is a

• Y linked disorder

• Autosomal sex disorder

• X linked disorder

• X linked disorder

What is biodiversity? Mention the implications of the loss of biodiversity.

“India has greater ecosystem diversity than Norway.” Do you agree with the statement? Give reasons in support of your answer.

Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisation.

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