Which one of the following statements correctly describes features shared by simple multicellular eukaryotes?
A. Cells adhere to one another, most of the
cells are capable of a wide range of functions,
including reproduction, and the loss of one or
more cells usually does not lead to the death
of the organism.
B. Cells adhere to one another and engage in
extensive communication with one another;
most of the cells are capable of a wide range
of functions, including reproduction; and the
loss of one or more cells usually does not
lead to the death of the organism.
C. Cells adhere to one another and most of
the cells are capable of a wide range of
functions except the ability to reproduce,
which means that the loss of certain cells
usually leads to the death of the organism.
A
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A pregnant woman had contact with her nephew who was just diagnosed with a rubella infection. Acute and convalescent samples were taken, which resulted in an acute titer of 1:16 and a con-valescent titer of 1:32 . Which one of the following comments explains the risk to the fetus?
a. The risk is low; a fourfold rise in titer is not present. b. The risk is high; more than a fourfold rise is present in titer. c. The risk is high because both titers are elevated. d. Rubella is not a congenital disease; there-fore the test should not have been ordered.
The antimicrobials produced by some molds and bacteria are generally called
A. insecticides. B. biocides. C. antiseptics. D. antibiotics
Which of the following is considered to be a plant behavior?
A. response to sunlight. B. response to plant hormones. C. response to touch.D. response to gravity. E. all of the choices.
A patient presenting a variety of symptoms, including generalized fatigue and neurological impairment, is brought to the hospital, where tests reveal a severe GTP deficiency in the patient’s liver. What is the likely cause of these symptoms?
a. The patient’s cells produce an overabundance of isocitrate, inhibiting GTP production. b. The patient’s diet contains insufficient quantities of alpha-ketoglutarate. c. The patient has a mutated form of the enzyme that regulates succinate synthesis. d. A fat-rich diet caused cholesterol to bond to GTP-precursors, inhibiting GTP production.