_____ are targets of cytotoxic T cells
a. Extracellular virus particles in blood
b. Virus-infected body cells or tumor cells
c. Parasitic flukes in the liver
d. Bacterial cells in pus
e. Pollen grains in nasal mucus
B
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Seagrasses are important in all the following except:
a. nutrient recycling. b. providing a habitat for animals. c. stabilizing sediments. d. being consumed by most estuarine herbivores.
Fred Griffith’s experiments with two strains of
Streptococcus pneumoniae a. resulted in a vaccine against bacterial pneumonia. b. demonstrated that rough (R) bacteria cause pneumonia. c. provided evidence that genetic material from one bacterial strain can be transferred to that of another strain. d. demonstrated that mice can transform harmless bacteria into pathogenic bacteria. e. demonstrated that a harmless, smooth bacterial strain can be transformed into a lethal, rough bacterial strain.
What did R. H. Whittaker base his five kingdom classification upon?
a. DNA sequencing analysis b. The size and color of cells c. The biochemical make-up of an organism d. Cell structure and how an organism derived its nutrition e. The ability to for an organism to reproduce and develop
Which of these is the correct explanation of mass change in developing eggs as illustrated in the graph?
A) A is the correct representation of mass change because as the baby bird develops inside the egg, it grows new parts. B) B is the correct representation of mass change because the baby bird uses cellular respiration to fuel the biosynthesis of new parts and gives off mass as CO2. C) C is the correct representation showing that nothing new comes into the egg and nothing leaves the egg, so it retains the same mass.