Cells carry out three major types of work; which of the following involves the synthesis of macromolecules as well as the breakdown of substances for their energy?
A. Chemical work
B. Mechanical work
C. Transport work
D. None of the choices are correct.
Answer: A
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The structure of a tissue is determined by
a. the structure and organization of the cell cytoskeleton. b. the type and organization of the extracellular matrix. c. the junctions holding cells together. d. the structure and organization of the cell cytoskeleton and the junctions holding cells together. e. the structure and organization of the cell cytoskeleton, the type and organization of the extracellular matrix and the junctions holding cells together.
In DNA,
a. G pairs with T and A pairs with C. b. G pairs with A and C pairs with T. c. G pairs with C and A pairs with T. d. G pairs with C and U pairs with A.
Which of the following is considered dangerously underweight?
A. A BMI of 15.5 or lower B. A BMI of 18.5 or lower C. A BMI of 25 or lower D. A BMI of 29.9 or lower E. A BMI of 40 or lower
________ isolating mechanisms are outside factors that prevent interbreeding
A) Behavioral B) Mechanical C) Extrinsic D) Intrinsic