The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1%. How could the cell obtain more calcium?
A. passive transport
B. diffusion
C. osmosis
D. active transport
D. active transport
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The concentration of CO2 in the atmosphere is lower than its concentration in the oceans
Indicate whether the statement is true or false
What has been the general trend of the world's catch usage? a. Increased fishmeal production
b. Decreased fishmeal production. c. Increased human consumption. d. None of these choices.
Predict what would happen if a mutation created a bacterium in the light organ of the squid that cannot produce bioluminescence?
A. Light producing bacteria out-compete non light producers B. The two populations establish a 50:50 equilibrium C. Non-light producing bacteria out-compete light producers D. Squidnado
In the ocean, ________ are present in the highest numbers
a. algae b. viruses c. Archaea d. bacteria