Why is oxygen needed in cellular respiration?
A) Oxygen combines with ADP to create ATP.
B) Oxygen is the final electron acceptor in the electron transport chain.
C) Oxygen carries electrons from the citric acid cycle to the electron transport chain.
D) Fermentation in muscle cells relies upon oxygen as an electron acceptor.
B
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Which cell type ranges in size from about 10 - 100 µm, has 80s ribosomes, and has internal compartments bounded by membranes?
A. Bacteria B. Eukarya C. Archaea
Which molecule comprises the largest proportion of the carbon reservoir in the ocean?
a. carbon dioxide b. carbonic acid c. bicarbonate ion d. carbonate ion
Of the following four islands at the same latitude, which one likely possesses the fewest species?
a. 1,000 square kilometers in area and 300 km from the mainland b. 3,000 square kilometers in area and 100 km from the mainland c. 100 square kilometers in area and 3,000 km from the mainland d. 300 square kilometers in area and 1,000 km from the mainland e. All islands are at the same latitude, so they are all likely to have the same species richness.
If a red blood cell, or any other type of human cell, is placed in a hypertonic solution, water enters the cell, causing it to swell and eventually burst
Indicate whether the statement is true or false