Coral reefs are made of
calcium carbonate
rock
sodium chloride
silica

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

Which of the following typically characterizes a tropical rainforests