Answer:
Each time your heart beats, an electrical signal travels through the heart. An EKG can show if your heart is beating at a normal rate and strength. It also helps show the size and position of your heart's chambers. An abnormal EKG can be a sign of heart disease or damage.
Answer:
Bacteria take DNA from their environment.
Explanation:
"Bacteria take DNA from their environment" is what best describes transformation in bacteria.
First four are made of rock and rest are made of gases.
Atmospheres of all the planets are made of gases.
