In general, ________ have a 2:1 ratio of hydrogen to oxygen.
A. nucleic acids
B. carbohydrates
C. proteins
D. lipids
E. enzymes
Answer: B
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Which class of antibodies is mainly found in sweat, tears, breast milk and GI secretions?
a) IgG b) IgA c) IgM d) IgD e) IgE
Which of the following is NOT true of the brachial plexus?
A. It is mainly derived from spinal nerves C5-C8, and T1. B. It gives rise to the musculocutaneous, axillary, radial, median and ulnar nerves. C. Its nerves control the shoulder and upper limb muscles. D. It contains the phrenic nerve and the ansa cervicalis. E. All of these are true of the brachial plexus.
________ is the period of time when the cell is not dividing
A) Anaphase B) Prophase C) Interphase D) Metaphase
The placenta is usually functioning to deliver nutrients and oxygen to, and remove waste from, the embryonic blood by the ________ week of pregnancy
A) first B) second C) third D) fourth E) fifth