Which of the following is an underwater opening from which mineral-rich water heated by geothermal energy streams out?
A. Hydrothermal vent
B. Iron–sulfur plume
C. Geothermal geysers
D. Continental shelf
E. Undersea volcano
Answer: A
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A cell that cannot form spindle fibers cannot ____
a. engage in energy production b. exchange gases across the plasma membrane c. perform mitosis nor meiosis d. perform DNA replication e. engage in protein synthesis
The half-life of carbon-14 is approximately 5,700 years. How much of an initial 1.0 gram sample of carbon-14 will remain after 11,400 years (two half-lives)?
a. 0.33 grams (33%) b. 0.5 grams (50%) c. 0.25 grams (25%) d. 0.12.5 grams (12.5%)
What is the function of secretion?
What will be an ideal response?
Which vein carries blood that has passed through the small intestine to the liver?
A. Jugular vein B. Pulmonary vein C. Hepatic portal vein D. Renal vein E. Femoral vein