What is the fall in the height of mercury column when the barometer is taken vertically upwards through a height of 1.5km (density of mercury
=13000kgm^3, density of air = 1.3 kgm)

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Energy flows from the producer level to the level. is called

Convection occurs when thermal energy is transferred by the movement of