Your answer is D. thermal energy.
Answer: natural, testable, observable
Explanation: i am pretty sure not positive
Answer: The excretory system is largely associated with the urinary, or renal, system. This system consists of various organs that produce and then excrete the urine out of the body: the kidneys, ureters, the bladder, and the urethra. They include the kidneys, large intestine, liver, skin, and lungs. The kidneys filter blood and form urine. They are part of the urinary system, which also includes the ureters, bladder, and urethra. Each kidney has more than a million nephrons, which are the structural and functional units of the kidney.
Explanation:
Answer:
when the producers(plants) absorbs nitrogen compounds from soil and use then to make proteins.
Answer: Anaerobic
Explanation:
Anaerobic is a term that refers to the absence of oxygen during a process (biological or chemical) OR in an living organism. For instance: living organisms that break down complex substances in the absence of oxygen are called Anaerobes, and undergo a anaerobic respiration.