Which of the following is a polyamide?

Degeneration of the corpus luteum causes

In which group of organisms do the cell walls form two thin overlapping shells that fit together?

The figure shows the vertical section of a frictionless surface. $A$ block of mass $2\, kg$ is released from position $A$. Its kinetic energy $(KE)$ as it reaches position $C$ is ................ $J$.

Out of $13$ cricket players,$4$ are bowlers. In how many ways can a cricket team of $11$ players be formed such that at least $2$ bowlers are included?

Particles and their anti-particles have