After which Period did the last mass extinction
occur?
a. Permian
b. Triassic
c. Jurassic
d. Ordovician
e. Cretaceous
E
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The TCA cycle is located in the ________ of bacteria, and in the ________ of eukaryotes.
A. cytoplasm; mitochondrial matrix B. plasma membrane; mitochondrial matrix C. plasma membrane; inner mitochondrial membrane D. cytoplasm; inner mitochondrial membrane
Whales use sound to
a. communicate. b. locate food. c. map out their surroundings. d. communicate and map out their surroundings. e. do all of these.
Cellular pH is kept near a value of 7 because of
a. salts. b. buffers. c. acids. d. bases. e. water.
Which tissue is characterized by a basement membrane and a single layer of flattened cells with a free surface?
A) Connective tissue B) Muscle tissue C) Simple epithelium D) Undifferentiated tissue E) Stratified epithelium