The average ocean temperature is shown in this graph with two different estimates using different methods. What has been the trend over time?
a. Ocean temperature has stayed the same since Earth formed.
b. Ocean temperature has increased since Earth formed.
c. Ocean temperature has decreased since Earth formed.
d. Ocean temperature has fluctuated wildly and no discernable trend can be found.
C
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During which phase(s) of aerobic respiration is ATP produced directly by substrate-level phosphorylation?
a. glycolysis only b. Krebs cycle only c. acetyl CoA formation only d. the Krebs cycle and glycolysis e. glycolysis, acetyl CoA formation, and Krebs cycle
Closely related species, like chimpanzees and humans, often differ in chromosome number by only one or two chromosomes, suggesting that chromosomes can experience fission and fusion over evolutionary time. Can you think of a way to test this?
What will be an ideal response?
The process by which mitochondria are thought to have arisen during evolution is called
a. symbiosis. b. phagocytosis. c. endosymbiosis. d. autophagocytosis
The critical ________ is the most important limiting factor that determines where a species lives.
Fill in the blank(s) with the appropriate word(s).