Which of the following is not one of the ways in which DNA differs from RNA?
a. DNA contains deoxyribose sugars.
b. DNA is usually a double-stranded molecule.
c. DNA contains thymine as one of its bases.
d. DNA can form hydrogen bonds with complementary sequences
Answer: d. DNA can form hydrogen bonds with complementary sequences.
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The radius and ulna are considered to be part of
a. both the axial skeleton and the appendicular skeleton. b. the axial skeleton. c. neither the axial skeleton nor the appendicular skeleton. d. the appendicular skeleton. e. the adaxial skeleton
Which of the following processes is the flow of heat between atoms or molecules in direct contact?
a. conduction b. radiation c. evaporation d. convection e. radiative cooling
In the knee-jerk reflex arc, the synapse between a
sensory neuron and a motor neuron occurs a. in the brain. b. between the receptor and the spinal cord. c. within the muscle of the leg. d. within the spinal cord. e. in the nerve leading to the spinal cord.
The burning of fossil fuels by cars and factories has most affected the ______________ cycle.
Fill in the blank(s) with the appropriate word(s).