Which of the following plants fits the
description of having flagellated sperm, xylem
and phloem, and a short-lived gametophyte?
a. peat moss
b. pine tree
c. rose
d. horsetail
e. more than one of these
D
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Carbon-14 has the same ________.
A) atomic number and atomic mass as carbon-12 B) atomic number and thus number of neutrons as carbon-13 C) atomic mass as both carbon-12 and carbon-13 D) number of protons but more neutrons than carbon-12
Of the following, which is probably the most common route for membrane flow in the endomembrane system?
a. Golgi lysosome ER plasma membrane b. tonoplast plasma membrane nuclear envelope smooth ER c. nuclear envelope lysosome Golgi plasma membrane d. rough ER vesicles Golgi plasma membrane e. ER chloroplasts mitochondrion cell membrane
Answer the following questions true (T) or false (F)
1. If an Rh-positive woman marries an Rh-negative man, their children are at risk for hemolytic disease of the newborn. 2. Infection with certain viruses may lead to the development of type I diabetes. 3. Depletion of the helper T cell population by HIV results in the development of AIDS.
A sick child may have influenza or RSV. These virus infections have different treatment options, so the physician requests antibody titer tests. The results are as follows: anti-influenza antibodies are primarily IgM, and anti-RSV antibodies are all IgA
and IgG. Which of the following is the most appropriate interpretation? A) the child has a current RSV infection and was previously exposed to influenza. B) the child currently has influenza and has previously been exposed to RSV. C) the child has concurrent influenza and RSV infections. D) the child has neither influenza nor RSV. E) the results do not provide sufficient data to draw a conclusion.