Which of the following is not a fresh water ecosystem

Four types of motile cells in human body?

What is the role of the phospholipid belayer in cellular transport in living cells

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen