***please help.*** 1. What is the relationship between DNA and gene expression? How do they depend on each other?

2. Why is it important for the “on” and “off” mechanism of gene regulation?

3. Since there are DNA segments that do not code for amino acids, what is their purpose?

**Please use simple answers considering I'm 10th-grade, thank you! <3**

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.

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis

The ultimate purpose of respiration: a. inhale 02 and exhale co2 b. place oxygen in the lungs c. place oxygen in the blood d. deliver oxygen to every blood cell