Figure 13.10 shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:
(a) At which point/s (A, B or C) in the curve is light a limiting factor?
(b) What could be the limiting factor/s in region A?
(c) What do C and D represent on the curve?

The graph of y = f(x) is given with six labelled points. Anser the following questions. (a) At which point f'(x) has the greatest value? (b) At which point f(x) and f'(x) both are zero? (c) At how many point f'(x) is negative ? (d) Which is the point of infection?

The figure given is a diagrammatic representation of response of organisms to abiotic factors. What do a , band c represent respectively?

Observe the given graph and answer the following question. (a) Which type of natural selection is represented by the graph? (b) Under which condition does this type of selection operates. (c ) Give an example for this type of natural selection.

Observe the histogram and answer the following question. (a) Which type of transpiration does 'A' and 'C' represent ? (b) Name 'B' and also define the plant part. Which is responsible for 'B' type of transpiration.

Polypeptide chains of two haemoglobin molecules are shown below. One of the chains shows an abnormality. Observe the diagram and answer the following questions. a. Which of the polypeptide chain in haemoglobin is abnormal leading to a disease? b. What is the reason for this abnormality? c. What will be the effect of this change in polypeptide chain?

Following is the graph of y = f' (x) , given that f(c) = 0. Analyse the graph and answer the following questions. (a) How many times the graph of y = f(x) will intersect the x - axis? (b) Discuss the type of roots of the equation f (x) = 0, a le x le b . (c) How many points of inflection the graph of y = f(x), a le x le b , has? (d) Find the points of local maxima/minima of y = f(x), a lt x b . (e) How many roots equation f''(x) = 0 has?

A is the set of factors of 12. Which one of the following is not a member of A. (A) 1 (B) 4 (C) 5 (D) 12

The graph of (y-x) against (y+x) is shown. fig which one of the following shows the graph of y against x ? fig (b) fig (c) fig (d) fig

In the adjoining figure, the radius of a circle with center C is 6 cm . Line AB is a tangent at A . Answer the following question . what is the measure of angleCAB ? Why ? What is the distance of point C from line AB ? Why ? (iii) d(A, B) = 6 cm, find d (B, C) . (iv) What the measure of angleABC ? Why ?

State which of the following sets are disjoint. R = {a, b, c, d, e}, S = {d, e, b, c, a}