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

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

As a small change in a person's dna can cause a genetic disorder

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.