Among the following factors, which combination is affect the origin and movement of ocean currents

1. Coriolis force
2. Earthquake and volcanic eruption
3. Atmospheric pressure and insalution
4. Salinity and density of water

Piperazine citrate is used to treat infection caused by 

What is the net gain of ATP molecules in the glycolysis step of anaerobic respiration

The number of mitochondria increases in the cells of 

The most abundant element in the earth's crust is 

An example of natural polymer