Which one of the following contributes the maximum percentage to the biodiversity of a vertebrate group?

Transmission of HIV infection occurs by:
(A) By transfusion of contaminated blood
(B) By sharing infected needles
(C) Sexual contact with HIV infected person
(D) From an infected mother to her child through the placenta
Choose the correct answer from the options given below:

Which of the following does not affect the Hardy-Weinberg equilibrium?

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically _______________ which is a white, odourless, bitter crystalline compound.

Taylor and colleagues proved semiconservative nature of DNA through their experiments on Vicia Faba

Match List - I with List - II.

List - I	List - II
(A) Plasmid of Salmonella	(I) Join foreign DNA to plasmid
(B) Restriction enzymes	(II) Insertional inactivation
(C) Ligases	(III) Construction of \(1^{s t}\) recombinant DNA
(D) \(\beta\)-galactosidase	(IV) Molecular scissors

Choose the correct answer from the options given below:

Which is not the male sex accessory gland?

In plants, competency of the host to take up the recombinant DNA is enabled by using__________ technique.

Match List-I with List-II

List-I (Electromagnetic waves)	List-II (Wavelength range)
(A) X-rays	(I) 1 mm to 700 nm
(B) Radio waves	(II) 0.1 m to 1 mm
(C) Infrared waves	(III) 1 nm to \( 10^{-3} \) nm
(D) Microwaves	(IV) >0.1 m

Choose the correct answer from the options given below:

A total of \(5.0 \times 10^{16}\) electrons per second go through a conductor of area \(2 mm^2\). The current density will be:

A p-type semiconductor can be obtained by adding

Biot-Savart law indicates that the moving electrons (velocity \(\vec{v}\)) produce a magnetic field \(\vec{B}\) such that:

The Differential Equation representing the family of tangents to the circle \(x^2+y^2=r^2\)is: