Why are the offsprings of oviparous animal at a greater risk as compared to offsprings of viviparous organisms?

What is the composition of semen?

Differentiate foeticide and infanticide

Brief about female heterogamety.

A low level of expression of lac operon occurs at all the windows for treatment of various genetic disorders. Justify the statement

Taking the example of Peppered moth, explain the action of natural selection. What do you call the above phenomenon?

Explain the structure of immunoglobulin with suitable diagram.

Justify the role of microbes as a bio-fertilizer

What are transgenic animals? Give examples

Give the diagnostic characters features of a Biome

Compare and Contrast the insitu and exsitu conservation. (or) What are the differences between in-situ and ex-situ conservation ?

Why does ozone hole form over Antarctica?

What is endothelium

What is meant by cytoplasmic inheritance

Explain the mechanism of crossing over.

How will you identify a vector ?

Give the examples for micro propagation performed plants .

Why do submerged plants receive weak illumination than exposed floating plants in a lake?

Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.

How do sacred groves help in the conservation of biodiversity?

What are the different types of hybridization?

Write the origin and area of cultivation of green gram and red gram.

Differentiate between:
Primary and secondary immune responses