Answer the following question given this paragraph: The plasma membrane is formed by a phospholipid bilayer. Q: What is the plasma membrane formed by? Choices: - a cytoplasm bilayer - cholesterol byproduct - single lipid layer - a phospholipid bilayer A:
a phospholipid bilayer
(Question)
Answer the following question given this paragraph: Structures like the human tail bone and whale pelvis are called vestigial structures . Evolution has reduced their size because the structures are no longer used. The human appendix is another example of a vestigial structure. It is a tiny remnant of a once-larger organ. In a distant ancestor, it was needed to digest food. It serves no purpose in humans today. Why do you think structures that are no longer used shrink in size? Why might a full-sized, unused structure reduce an organism's fitness?. Q: Structures like the human tail bone and whale pelvis are called what? Choices: - primordial structures - parasitic structures - adaptations - vestigial structures A:
(Answer)
vestigial structures
Ques: Answer the following question given this paragraph: Buffer Systems in the Body The buffer systems in the human body are extremely efficient, and different systems work at different rates. It takes only seconds for the chemical buffers in the blood to make adjustments to pH. The respiratory tract can adjust the blood pH upward in minutes by exhaling CO2 from the body. The renal system can also adjust blood pH through the excretion of hydrogen ions (H+) and the conservation of bicarbonate, but this process takes hours to days to have an effect. The buffer systems functioning in blood plasma include plasma proteins, phosphate, and bicarbonate and carbonic acid buffers. The kidneys help control acid-base balance by excreting hydrogen ions and generating bicarbonate that helps maintain blood plasma pH within a normal range. Protein buffer systems work predominantly inside cells. Q: The kidneys help control acid-base balance by excreting _____ and generating bicarbonate that helps maintain blood plasma ph within a normal range? Choices: - magnesium ions - sodium ions - lithium ions - hydrogen ions A:
Ans: hydrogen ions
(Q).
Answer the following question given this paragraph: All cells, including both plant and animal cells, need energy for processes such as active transport. How do cells obtain the energy they need?. Q: All cells need what for processes like active transport? Choices: - hydrogen - sunlight - oxygen - energy A:
(A).
energy
Ques:Answer the following question given this paragraph: The White Mountains in New Hampshire are part of the Appalachian province. The mountains are only around 6,000 feet high. Q: The white mountains in new hampshire are part of what province? Choices: - montreal - geologic - antarctic - appalachian A:

Ans:appalachian
Ques: Answer the following question given this paragraph: Nails are similar to claws in other animals. They cover the tips of fingers and toes. Fingernails and toenails both grow from nail beds. As the nail grows, more cells are added at the nail bed. Older cells get pushed away from the nail bed and the nail grows longer. There are no nerve endings in the nail. Otherwise cutting your nails would hurt a lot!. Q: Nails cover the tips of what? Choices: - lips and teeth - fingers and lips - ribs and nerves - fingers and toes A:
Ans:
fingers and toes