Answer the following question given this paragraph: Q: What organ contributes about 60% of the volume of semen ? Choices: - complete vesicles - cilia - long vesicles - seminal vesicles A:
seminal vesicles
(Question)
Answer the following question given this paragraph: Q: Which factor often changes a protein from an inactive form to an active form? Choices: - oxygen groups addition - lipid groups addition - nitrogen groups addition - phosphate groups addition A:
(Answer)
phosphate groups addition
Ques: Answer the following question given this paragraph: Fish have a circulatory system with a two-chambered heart. Their digestive system is complete and includes several organs and glands. Jawed fish use their jaws and teeth to grind up food before passing it to the rest of the digestive tract. This allows them to consume larger prey. Q: Fish have a circulatory system with a two-chambered what? Choices: - brain - lung - stomach - heart A:
Ans: heart
(Q).
Answer the following question given this paragraph: Q: Activated macrophages and neutrophils discharge what that signals molecules that enhance an immune response? Choices: - alkaloids - pathogens - nucelotides - cytokines A:
(A).
cytokines
Ques:Answer the following question given this paragraph: Noble gases are also used to fill the glass tubes of lighted signs like the one in the Figure below . Although noble gases are chemically nonreactive, their electrons can be energized by sending an electric current through them. When this happens, the electrons jump to a higher energy level. When the electrons return to their original energy level, they give off energy as light. Different noble gases give off light of different colors. Neon gives off reddish-orange light, like the word "Open" in the sign below. Krypton gives off violet light and xenon gives off blue light. Q: What type of gas is used to fill glass tubes of lighted signs? Choices: - synthetic - inert - natural - noble A:

Ans:noble
Answer the following question given this paragraph: Q: What do you call the hard case that surrounds the soft parts of some animals? Choices: - muscles - shell - membrane - exoskeleton A:
exoskeleton