Some of these can easily be eliminated by knowing that both nitrogen 14 and nitrogen 15 are isotopes ( same element, with the same amount of protons, but with different numbers of neutrons) of nitrogen. So if the only difference between nitrogen 14, 15 , and regular nitrogen is the amount of neutrons...how many protons and electrons should both nitrogen 14 and 15 have? After thinking, you should be able to eliminate A, B,and C.
Answer:
The organisms in which are able to adapt and become stronger.
Explanation:
In Darwin's theory, only the strongest and capable of adaption survive to natural challenges.
The answer is D. They use photosynthesis to turn sunlight, carbon dioxide, and water into carbohydrates.
Answer:
The purpose of vaccination is to produce immunity.
Explanation:
Immunity means the presence in a person's body of cells and substances known as antibodies that can produce a protective immune response.
