Identify the Australian marsupials showing adaptive radiation.
(A) Sugar Glider
(B) Wolf
(C) Bandicoot
(D) Wombat
Choose the correct answer from the options given below :

Which is not an example of convergent evolution?

An example of inverted ecological pyramid is:

Sex chromosomes of female in chicken are:

Which of the following is always upright in an ecosystem?

Match List I with List - II. -

List - l	List - II
(A) Colostrum	(l) T-lymphocyte
(B) Histamine	(II) Preformed antibodies
(C) Passive immunisation	(III) Yellowish fluid
(D) Cell-mediated immunity	(IV) Mast cell

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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 is not the cellular barrier of innate immunity?

The integrating factor of the differential equation \(\frac{d y}{d x}+y \cot x=2 x+x^2 \cot x, x \neq 0\) is

A radioactive sample has a half life of 12 years. The fraction of sample that will decay in 24 years is :

The slope of normal to the curve \(y=3 x^2-6 x\) at \(x=0\) is:

Which of the following statements are true?
(A) The function \(f(x)=\frac{x^4}{4}-\frac{4}{3} x^3+\frac{x^2}{2}+6 x\) has 3 critical points.
(B) The function \(f(x)=|x|+3\) has no minimum value.
(C) A local maximum value is always the absolute maximum value.
(D) \(f(x)=x^2\) has minima at \(x=0\).
Choose the correct answer from the options given below :

If \(x=a \sin ^2 \theta, y=a \cos ^2 \theta\) then \(\frac{d y}{d x}\) =

Taq polymerase is isolated from: