Which of the following statements concerning specific immunity is FALSE?
A) It is the third line of defense.
B) It has memory.
C) It changes little with repeated exposure to the same pathogen.
D) It is acquired.
E) It is the body's ability to respond to specific invading pathogens.
C
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Microbiota Comparison Among Animals
What will be an ideal response?
Honeybees have an incredible ability to distinguish thousands of different odorant molecules, using their large repertoire of olfactory receptors. A wide variety of different types of chemicals can be detected as odorants; they simply require olfactory neurons with a receptor that can bind the chemical and transduce that stimulus into a receptor potential.Because small quantities of powerful explosives can be hidden easily, a sensor that could detect trace amounts of illicit chemicals would be a useful tool. What animal sensory modality is exquisitely sensitive to minute quantities of airborne chemicals?
A. Taste B. Vision C. Touch D. Olfaction E. Hearing
Genetic drift is a process that has a greater effect on populations that
(a) are large. (b) are small. (c) are not affected by mutation. (d) do not go through bottlenecks.
Which of the following vertebral column levels has the thickest intervertebral disc?
A) between T12 and L1 B) between C7 and T1 C) between C1 and C2 D) All of the answers are correct. E) None of the answers are correct.