Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

What do oral pills contain and how do they act as effective contraceptives?

OR

Name the hormonal composition of the oral contraceptive used by human females. Explain how does it act as contraceptive?

What do you understand by allopatric and sympatric speciation? What are the prerequisite for it and what isolating mechanisms are present in such species?

How do plants tide over stressful environmental conditions?

What is Bio piracy? State the initiative taken by the Indian Parliament towards it.

What is parturition ? Which hormones are involved in induction of parturition ?

List any four parasitic adaptations in a parasite.

OR

List any four features evolved in animals to adapt to their parasitic mode of life.

Write the function of adenosine deaminase enzyme. State the cause of ADA deficiency in humans. Mention a possible permanent cure for an ADA deficiency patient.

If the nodules located on the roots of a leguminous plant are destroyed, what will be the effect on the plant? Explain the reason.

If a regular dose of drug or alcohol is not provided to an addicted person, he shows some withdrawal symptoms. List any four such withdrawal symptoms.

Write about the microbes which play significant role in antral of pathogenic bacteria ?