In algae,the photosynthetic pigments are present in

If a convex lens of focal length $80 \ cm$ and a concave lens of focal length $50 \ cm$ are combined together,what will be their resulting power?

The resolving limit of a healthy human eye is about

The number of points in $(-\infty, \infty)$,for which $x^2-x \sin x-\cos x=0$,is

Which of the following are fused in somatic hybridization involving two varieties of plants?

Three rods of the same dimensions have thermal conductivities $3 K, 2 K$,and $K$. They are arranged as shown in the figure below. The temperature of the junction in the steady state is: