Name the process in animals which require meiosis to take place

Can someone i have no idea of how to do this.

How does the diagram explain ocean currents? earth tilt 23.5 degreesquestion 1 options: earth's tilt causes uneven heating of earth which causes currents.earth's tilt causes the ocean to move because of gravity.earth's tilt and its rotation cause currents.earth's tilt causes uneven distribution of salt which causes currents.

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above