What is lanugo?
A. It is the name given to a turtle egg.
B. It is the viscous material found inside a reptilian egg that nourishes the infant.
C. It is the place where the umbilical cord attaches to the fetus.
D. It is the downy body hair that covers the fetus in the fifth month of gestation.
E. It is the opening into the human vagina.
Answer: D
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Which of the following statements is
INCORRECT?
a. Viruses are not able to move by themselves. b. Viruses are not able to reproduce by themselves. c. Viruses are not structurally organized. d. Viruses are nonliving particles. e. Viruses contain instructions to manufacture themselves
A base-pair substitution may alter a protein by changing an amino acid or by introducing a(n)
_____________________. Fill in the blank(s) with the appropriate word(s).
Identify the incorrect pairing of tissue type with cell type.
A. vascular tissue - xylem B. epidermal tissue - parenchyma cells C. epidermal tissue - cuticle D. ground tissue - collenchyma cells
Enzymes catalyze chemical reactions by
a. lowering the activation energy, thus increasing the rate of the reaction. b. increasing the activation energy, thus increasing the rate of the reaction. c. making the reaction exergonic. d. releasing free energy.