The net movement of molecules from a high concentration to a low concentration is best described by which of the following?
A) Endocytosis
B) Exocytosis
C) Osmosis
D) Active transport
E) Passive transport
E
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Which of the following can cause toxic shock syndrome?
A) Clostridium difficile and Clostridium perfringens B) Mycoplasma pneumoniae and Mycobacterium tuberculosis C) Neisseria gonorrhoeae and Escherichia coli D) Staphylococcus aureus and Streptococcus pyogenes
All cells have:
a. a nucleus, but not necessarily DNA b. a plasma membrane, but not necessarily DNA c. cytoplasm, but not necessarily a plasma membrane d. cytoplasm and a plasma membrane, but not necessarily DNA e. cytoplasm, a plasma membrane, and DNA
Which of the following organisms is a multicelled
producer?
a. an oak tree b. Candida, a pathogenic fungus c. E. coli, a common intestinal bacterium d. a Siberian tiger e. more than one of these
Modified leaves that protect meristematic tissue at the tips of woody plants are known as:
a. bulbs. b. bud scales. c. spines. d. tendrils. e. scale scars.