Q: Unlike nuclear fission, which involves dangerous radioisotopes, nuclear fusion involves what two harmless elements? Choices: - magnesium and helium - hydrogen and oxygen - hydrogen and carbon - hydrogen and helium A:
hydrogen and helium

(Question)
Q: The digestive organs within the abdominal cavity are held in place by the peritoneum, a broad serous membranous sac made up of squamous epithelial tissue surrounded by this? Choices: - mucus - skin - bone - connective tissue A:
(Answer)
connective tissue

Ques: Q: What does the armor including spines in some species offer? Choices: - nutrition - protection from cold - energy - protection from predators A:
Ans: protection from predators

(Q).
Q: What are the primary cells of adaptive immune response? Choices: - erythrocytes - red blood cells - white blood cells - lymphocytes A:
(A).
lymphocytes

Ques:Q: The outermost layer of the leaf is the epidermis; it is present on both sides of the leaf and is called the upper and lower epidermis, respectively. botanists call the upper side the adaxial surface (or adaxis) and the lower side this? Choices: - dorsal surface - posterior surface - anterior surface - abaxial surface (or abaxis) A:

Ans:abaxial surface (or abaxis)

Ques: Q: What sound can be heard when sound waves bounce back from a hard object? Choices: - loop - eerie - boom - echo A:
Ans:
echo