Why have many animals not evolved thermo regulation?

A plasmid without a selectable.marker was chosen as vector for cloning a gene. How does this affect the experiment?

Why are antibiotic-resistance genes used as markers in E.coli?

Why do the doses of drugs keep on increasing or lead to greater intake and addiction ?

Why is the enzyme DNA-polymerase called DNAdependent DNA-polymerase?

Write the possible genotypes Mendel got, when he crossed F₁ tall pea plant with a dwarf pea plant.

Name the substance produced by a cell in viral infection that can protect other cells from further infection. 

How does MOET help in cattle breeding?

What are the different attachment sites on t RNA?

MOET is a programme for heard improvement. Expand this term and arrange the following step in correct sequence.
a) Produce 6-8 egg.
b) A cow is administered hormones with FSH like activity.
c) Mating the animal with an elite bull.
d) Transferred to surrogate mothers.
e) Fertilized eggs at 8-32 cell stages are recovered non surgically.

A person is physical fit, exercises, eats balanced diet but his neighborhood was always noisy which disturbed his sleep. How can this situation affect the health of the person? Does this situation fit into the definition of health?

Why small black birds later called Darwin Finches found in Galapagos Islands amazed Darwin.Which evolutionary phenomenon is represented by Darwin finches.
Give any other example of this phenomenon. When is this phenomenon indicative of convergent evolution?

A) Draw a pedigree chart of a family consisting of the following members, age given Within brackets: - father [70] is normal, mother [65] is a carrier, one son [40] is Normal, second son [37] is affected (sufferer). One daughter (33) is normal (non - Carrier), second daughter (30) is normal (carrier).
b) If no daughter in the above family could be born as affected for this trait , work out in a punnet square to find out if this trait could be phenylketonuria and conclude by saying yes or no . [You can use the letters ‘A’ and ‘a’ for the dominant and recessive allele of this gene respectively]

"Creating awareness among people about various reproductions related aspect and providing facilities and support for building up a reproductively healthy society are the major tasks of a good government. For this various programmes are undertaken". Name the programs?

It is a major approach of crop improvement programme. In such crossing experiment it is important to make sure that only the desired pollen grains are used for pollination and the stigma is protected from contamination. How can it be achieved?

The chromosome number of a meiocyte of a house fly and that of a human is 12 and 46 respectively. What is the number of chromosomes in their mitocytes?

Different the following diagrams based on the process going on:-

Explain the consequence if the oxygen availability to activated sludge flocs is reduced.

Give the name of a phenomenon in which separate male and female flowers are borne on the same individual at different positions to prevent autogamy.

What would happen if our intestine harbors microbial flora exactly similar to that found in the rumen of cattle?

Why are vectors needed for replication of DNA during rDNA technology?

In yeast and Amoeba, the parent cell divides to gives rise to two new individual cells.  How does the cell division differ in these two organisms?

The meiocyte of rice has 24 chromosomes. Write the number of chromosomes in its endosperm.

An anther with malfunctioning tapetum often fails to produce viable male gametophyte. Give any one reason.