If many corals secrete a hard outer covering that builds up to become a coral reef, then many corals secrete what to form a coral reef? Answer choices: - Chlorophyll - salt and water. - The area was once underwater - Chemical energy - aqueous solution - Organic compounds - gastropod shells - hard outer covering
hard outer covering

If chemical messengers control anti-aging, then what controls anti-aging? Answer choices: - A computer - air - chemical messengers - ice - an electric stove - Electrical energy - water - Chemical energy
chemical messengers

Q: If when p53 is mutated a tumor may form, then if a tumor has formed, this gene might have mutated:? Answer choices: - p53 - SNPs - OCA 2 - DNA - gene - tRNA - malignancy - TRH
A: p53

Question: If hIV contains DNA, then what contains DNA? Answer choices: - ovum - DNA - HPV - p53 - HIV - O3 - RNA - gene
Answer: HIV

*Question*
If plasma is hot, then what is plasma? Answer choices: - hot - fungible - cell - gas - p53 - TRH - calm - fickle
**Answer**
hot

(Q).
If astronauts require preserved meals for extended flights, then what do astronauts need for extended flights? Answer choices: - hydrogen and oxygen - preserved meals - solid, liquid, gas - small meals - fresh meals - Dehydration - nutrients - surprise meals
(A).
preserved meals