Which one of the following best explains why humans must constantly breathe in oxygen in order to stay alive?
A) Oxygen is an important source of energy for cells and is used to make glucose.
B) Oxygen is essential for the production of most of the ATPs required to fuel cell functions.
C) Oxygen must be available to cells in order for them to make the sugars necessary to supply energy for cell functions.
D) Oxygen is used to drive the anaerobic breakdown of sugars for the production of ATP.
E) Oxygen is converted to carbon dioxide, which is then used to drive the production of ADP.
B
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Angiosperms that have only one embryonic seed leaf are called:
A. eudicots. B. gnetophytes. C. ginkos. D. monocots. E. bryophytes.
Cat scratch fever is caused by
A. Bartonella (Rochalimaea) henselae. B. Pasteurella multocida. C. Teddis nugentaea. D. Staphylococcus aureus. E. Bartonella (Rochalimaea) henselae AND Staphylococcus aureus.
Which of the following types of interactions is advantageous for one species, but has a negative effect
on the other?
a. predation b. herbivory c. mutualism d. parasitism e. predation, herbivory and parasitism
In comparing mitosis and meiosis, which statement is true?
a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Pairing of homologues occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.