Some archaea have unique phospholipids in their cytoplasmic membrane that
A) form a monolayer due to the presence of diglycerol tetraethers.
B) form a bilayer due to the presence of sterols.
C) form a stable ring structure due to the presence of crenarchaeol.
D) form a bilayer due to the presence of phosphatidylethanolamine.
Answer: A
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An endemic species is one that
A. has been cultivated by humans. B. functions as a keystone species. C. is found in only one particular place or region. D. can be used as an indicator species. E. does not effect ecosystem function.
Blood flows from the peritubular capillaries to the structure indicated by the letter ____
a. A b. B c. C d. D e. E
Some protobionts have been shown to have the ALL of following features except
a. divide by binary fission. b. maintain a chemical environment different from their external environment. c. metabolize certain compounds. d. grow in size. e. disorganization
What did the researchers conclude from the data shown in the figure? Select one:
a. Resistance to Bt toxin is not genetic. b. Resistance to Bt toxin is recessive. c. The size of larvae is dependent on treatment with Bt toxin. d. The number of larvae is dependent on treatment with Bt toxin. e. Resistance to Bt toxin is dominant.