What happens to new oceanic crust at a mid-ocean ridge
a. it forms new mountains under the water
b. it climbs up the mantle to form a trench
c. it gets hotter and sinks into a trench
d. it is so dense that gravity pulls it into a deep-ocean trench

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Variety of living organisms; includes genetic, species, and ecological types.

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.