A hydrothermal vent ecosystem does not run on energy from the sun. Describe the source of its energy
What will be an ideal response?
At hydrothermal vents, hot water rich in dissolved minerals spews out from an opening on the ocean floor. The water is seawater that seeped into cracks in the ocean floor at the margins of tectonic plates and was heated by heat energy from within the Earth. Minerals in this water settle out when it mixes with the cold deep-sea water.
Chemoautotrophic bacteria and archaea that obtain energy by removing electrons from minerals are the main producers in food webs that include diverse invertebrates.
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With modern molecular techniques, it is now possible to completely assemble a genome from a single cell
Indicate whether the statement is true or false.
The introduction mentions three out of four major tissue types found in animals. The tissue
that is not mentioned is __________ tissue.
a. nervous b. brain c. blood d. fat
In the second half of the twentieth century, human activities have more than tripled the amount of nitrogen released
from land into the atmosphere or aquatic systems.
Indicate whether the statement is true or false.Which one of the following statements about the trophic cascade in the sea otter and sea urchin-kelp communities along the West Coast of North America are true? Check all that apply.
_____ Increased sea otter populations are linked to more profuse growth of the kelp forests. _____ Increased orca (killer whale) predation on sea otters is linked to more profuse growth of the kelp forests. _____ Increased sea otter populations are linked to increased sea urchin populations. _____ Increased orca (killer whale) predation on sea otters is linked to increased sea urchin populations. _____ Increased sea urchin populations are linked to less profuse growth of the kelp forests.