Help me please :) Answer choices:

1-Valine and aspartic acid
2-Serine and glutamic acid
3-Isoleucine and histidine
4-Methionine and glutamine

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.

To be or not to be that is da question

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?