Which type of reproduction is effective -Asexual or sexual and why?

Draw a labeled sketch of a spermatozoan.

Correct the following statements
a) Transfer of an ovum collected from donor into the fallopian tube is called ZIFT.
b) Transfering of an embryo with more than 8 blastomeres into uterus is called GIFT.
c) Multiload 375 is a hormone releasing IUD.

What is criss-cross inheritance?

Mention any two ways in which single nucleotide polymorphism (SNPs) identified in human genome can bring revolutionary change in biological and medical science.

Explain how mutations, natural selection and genetic drift affect Hardy Weinberg equilibrium.

Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role. Liver, thymus, stomach, thyroid, tonsils.

Give any two bioactive molecules produced by microbes and state their uses.

Explain how “Rosie” is different from a normal cow

Define ecological niche.

How many hotspots are there in India? Name them

Discuss the causes and effects of global warming. What measures need to be taken to control global warming?

What is layering?

Give the names of the scientists who rediscovered Mendelism

What is the difference between missense and nonsense mutation?

You are working in a biotechnology lab with a bacterium namely E.coli. How will you cut the nucleotide sequence? explain it.

Write the various steps involved in cell suspension culture.

What is Phytoremediation ?

Discuss the gross primary productivity is more efficient than net primary productivity.

Give four examples of plants cultivated in commercial agroforestry.

How are microbial inoculants used to increase the soil fertility?

Name the humors that are responsible for the health of human beings.

Name and explain the type of barriers which involve macrophages.