The answer is A, Viruses
Viruses cannot reproduce on their own , so they have to inject their DNA or RNA into the nucleuus of a cell. By doing this, the virus will take over that cells and within times, that cells will pop up and producing more viruses.
This reproduced virus will repeat the same process until our immune systems stop them
Answer:
a. Approximately half of those with anorexia nervosa go on to develop bulimia nervosa, indicating that the two disorders may not be distinct but may represent phases of the same eating disorder.
The answer is True (the functions of body systems, like the lungs and heart differ between humans and animals).
Answer:
Cellular respiration only.
Explanation:
Animal cells do not photosynthesize, but they do cellular respiration.
