Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

What is the function of bulbourethral glands?

Answer the following questions:
What is amniocentesis and why there is a statutory ban on it?

What do you think is the significance of reproductive health in a society?

Describe the decomposition cycle in a terrestrial ecosystem and make its diagrammtic representation.

(a) Write the conclusions drawn by Alexander von Humbolt based on his extensive exploration of South America.
(b) Study the graph given below :

According to Alexander von Humbolt, what do the symbols S, A, C, and Z used in graphs indicate in the context of a species and region relationship?

On a visit to a Hill station, one of your friends suddenly became unwell and felt uneasy.

1. List two symptoms, you would look for, to term it to be due to allergy.
2. Explain the response of the body to an allergen.
3. Name two drugs that can be recommended for immediate relief.

Answer the following questions with reference to opioids, the commonly abused drug :
a. Where in our body are the specific opioid receptors present?
b. What is heroin chemically known as?
c. Write the scientific name of the plant from which opioids are extracted.

A person is born with a hereditary disease with a weakened immune system due to deficiency of an enzyme. Suggest a technique for complete cure for this disease, identify the deficient enzyme and explain the technique used for cure.

Following the collision of two trains, a large number of passengers are killed. A majority of them are beyond recognition. Authorities want to hand over the dead to their relatives. Name a modem scientific method and write the procedure that would help in the identification of kinship.