Coral reefs cover less than ___ of the ocean floor.
A)1%
B)2%
C)4%
D)3%

Why is it important to study each branch of earth science?

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b. through genes c. through seasonal cycles d. through hibernation