how many pairs of electrons does the carbon atom share with each hydrogen atom in the chemical compound methane which has the formula ch 4?

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?