Secondary productivity is :

Net primary productivity is the:

Which one of the following tests would be recommended by the doctor to confirm typhoid ?

Observe the figures and answer the question.

Why is it that most zygotes divide only after certain amount of endosperm is formed?

The technology of biogas production was developed in India mainly due to the efforts of -

In sewage treatment, flocs are:

The two alleles of a gene pair are located on -

Identify the optically active compounds from the following:
(A) \(\left[ Co ( en )_3\right]^{3+}\)
(B) trans \(-\left[ Co ( en )_2 Cl _2\right]^{+}\)
(C) cis- \(\left[ Co ( en )_2 Cl _2\right]^{+}\)
(D) \(\left[ Cr \left( NH _8\right)_5 Cl \right]\)
Choose the correct answer from the options given below:

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 of the following drugs are commonly used to quickly reduce the symptoms of allergy?

Isopropylbromide reacts with silver nitrite to form major product as

If f(x) and g(x) are continuous functions in [0, a] such that f(x) = f(a - x) and g(x)+g(a - x) = a then \(\int_0^a f(x) g(x) d x=\)

If \(x=a \cos ^3 \theta, y=a \sin ^3 \theta\). The value of \(\frac{d^2 y}{d x^2}\) at \(\theta=\frac{\pi}{6}\) is :

The point on the curve \(y=(x-2)^2\) at which the tangent is parallel to the chord joining the points \((2,0)\) and \((4,4) \) is :