A vestigial trait A) is caused by inactive genes

B) is a sign of an intermediate form

C) no longer appears in the genetic code of an organism

D) no longer performs the function for which it originally evolved

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

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.

What is the next step in muscle contraction after the actin changes shape? (apex)