STIs are reported to be very high among persons in which age group?

Cocaine is obtained from

Which type of interaction is shown by the marine fish and copepods:

In flowering plants, zygote develops into :

Generally, an angiosperm embryo sac at maturity is -

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 diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which one of the following drugs can not quickly reduce the symptoms of allergy?

The method of producing thousands of plants through tissue culture is called as:

Which of the following statements are incorrect?
(A) Fragments of DNA can be separated by ELISA.
(B) Transformation is a procedure through which a piece of DNA is introduced in a host bacterium.
(C) Recombinant DNA technology does not involve isolation of a desired DNA fragment.
(D) DNA ligases are used for stitching DNA fragments into a vector.
Choose the correct answer from the options given below:

A small telescope has an objective lens of focal length 120 cm and an eyepiece of focal length of 5.0 cm. The magnifying power of telescope for viewing distant objects in normal adjustment is

Arrange the following spermatogenic cells in correct sequence of spermatogenesis.
(A) Spermatids
(B) Spermatogonium
(C) Secondary Spermatocytes
(D) Primary Spermatocytes
Choose the correct answer from the options given below:

In aldehydes, the carbonyl group is bonded to a carbon and hydrogen, while in ketones it is bonded to two carbon atoms. The carbonyl compounds in which carbonyl group is bonded to oxygen are known as carboxylic acid and their derivatives.
Which series represents compounds in increasing order of acidity?

Let A be any square matrix of order n, then which of the following are true?
(A) \(|\operatorname{adj} A |=| A |^{n-1}\)
(B) \(\left| A ^{-1}\right|=\frac{1}{| A |}\)
(C) \(|\operatorname{adj} A |=| A |^n\)
(D) \(\left( A ^{ T }\right)^{-1}=\left( A ^{-1}\right)^{ T }\)
Choose the correct answer from the options given below :

Select the high spin complexes from the following:
(A) \(\left[ Ni ( CN )_4\right]^{2-}\)
(B) \(\left[ Fe ( CN )_6\right]^{3-}\)
(C) \(\left[ MnBr _4\right]^{2-}\)
(D) \(\left[ Fe \left( H _2 O \right)_6\right]^{2+}\)
Choose the correct answer from the options given below: