How do we know that pakicetus is related to whales and dolphins?

Biology 1c cumulative exam i need awsners

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions