Which of the following best explains the role of deep sea coral reefs in the environment?
a.
they are responsible for fouling fishing lines.
b.
they are a quick-growing food source for deep water predators.
c.
they provide a critical habitat for many other organisms.
d.
they are a record of past climate conditions.

What is the primary goal of human communities?

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils