The supercontinent Pangea ____
a. existed over 500 million years ago
b. broke apart to form Gondwana
c. formed about 270 million years ago
d. was located only in the southern hemisphere
e. formed only North and South America
ANSWER: c
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Plants share a most recent common ancestor with what group of protists?
A. green algae B. red algae C. brown algae D. cyanobacteria E. dinoflagellates
Which of the following steps in the Citric Acid Cycle produce a CO2?
1.malate to oxaloacetate 2.succinate to fumarate 3.isocitrate to alpha-ketoglutarate 4.succinyl CoA to succinate 5.citrate to isocitrate
A rock that is broken into smaller fragments as a result of freezing and thawing has experienced ________ weathering
Fill in the blank(s) with correct word
Coagulation contributes to homeostasis by
A. regulating body temperature. B. removing debris from the blood. C. destroying pathogens. D. maintaining the pH of the blood. E. keeping the blood within the vessels.