The typical test cross is performed between -

Sickle-cell anaemia is:

Observe the figure and answer the following:


What is the above figure representing?

Periodic abstinence is an example of:

The triple fusion in angiosperms results in the development of:

The flower tops, leaves and the resin of cannabis plant are used in various combinations to produce marijuana, hashish, charas and ganja. These are known for their effects on ____________ of the body.

Read the passage carefully. Attempt the questions.
In our body, cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of these regulatory mechanisms. Cancerous cells just continue to divide giving rise to masses of cells called tumors. Benign tumors normally remain confined to their original location. The malignant tumors, on the other hand are a mass of proliferating cells. These cells actively divide and starve the normal cells by competing for vital nutrients. Cells sloughed from such tumors reach distant sites through blood, and wherever they get lodged in the body, they start a new tumor there. This property is called metastasis. Transformation of normal cells into cancerous cells may be induced by physical, chemical or biological agents called carcinogens.
Normal cells show a property that does not allow their uncontrolled growth. This property is known as:

A biconvex lens has radii of curvature of 10 cm each. If the refractive index of the material of the lens is 1.5, what will be its focal length in air ?

Consider a L.P.P, Maximize \(Z=3 x+5 y\) subject to constraints \(2 x+6 y \leq 6, x-y \geq 0, x \geq 0, y \geq 0\). Then which of the following are true?
(A) The feasible region of L.P.P is bounded region
(B) The corner points of the feasible region are \((0,0),(2,2),(0,1)\)
(C) Maximum value of Z is 9
(D) Point \((1,3)\) lies in the feasible region
Choose the correct answer from the options given below :

A small square loop of wire of side l is placed inside a large square loop of wire of side L (L >> l).
The loops are co-planar and their centres coincide. The mutual inductance of the system is proportional to

Darwin's finches and Australian marsupials are an example of:

Consider sets A and B, each having 4 elements. If \(f : A \to B\) be a function, then number of functions from A to B are:

C and Z in the species-area relationship log S = log C + Z log A represents: