Aliving factor in an ecosystem, such as plants and animals

a. abiotic factor
b. biotic factor

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

Glands that the body deal with stress and respond to emergencies.

Malaria is caused by which type of microorganism? a. fungi b. bacteria c. protozoa d. worms