The hearts of a fetal pig and a human are similar in that they are
a. the primary pump of the circulatory system of the body.
b. both four chambered.
c. composed of cardiac muscle tissue.
d. all of the above.
d
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What is the main difference between a disturbance and a disturbance regime?
A) A disturbance regime includes defining the predictable frequency and severity of the disturbance. B) A disturbance regime includes defining the length of the disturbance. C) A disturbance regime is a more specific type of disturbance. D) They are essentially the same thing.
Newborn screening using mass spectrometry identifies certain single-gene disorders by detecting
A) the causative mutation. B) the wild type gene sequence. C) an unusual metabolite or metabolic imbalance. D) abnormal proteins in urine.
People who have a single X chromosome are female, while those with XXY sex chromosomes are males. In order to be a female, a human
a female, a human a)must have two X chromosomes. b)cannot have a Y chromosome. c)must have only one X chromosome. d)must have only one Y chromosome. e)cannot have an X chromosome.
Which statement about the focusing of light by the eyes is true?
A) Squids and many fishes change the shape of their lenses to focus light. B) Mammals focus light when a rigid lens is moved back and forth. C) Mammals use muscles and ligaments to change the shape of their lenses to focus light. D) Mammalian lenses thicken when focused on distant objects.