In which of the following organisms is a three-chambered heart found?

The process of removing seed dormancy by mechanically breaking or removing the seed coat is called:

Two soap bubbles combine to form a single bubble. In this process, the change in volume and surface area are respectively $V$ and $A$. If $P$ is the atmospheric pressure, and $T$ is the surface tension of the soap solution, the following relation is true :

Let $u$ and $v$ be two vectors. Then,$|u-v|=||u|-|v||$ if and only if

The image of the point $(3, 2, 1)$ in the plane $2x - y + 3z = 7$ is