For the cause of the gas in our air
Molecular clocks B. TAKE ADVANTAGE OF THE FACT THAT ALL MUTATIONS HAPPEN AT A STEADY RATE.
The molecular clock is a technique used involving the mutation rate of biomolecules to deduce when in prehistoric times have two or more lifeforms diverged.
Tertiary consumer because you have no predators trying to eat you. You are at the top of the food web
When performing rescue breathing be sure to always tilt the head before performing breaths. It involves the following steps; place the person on their back, tilt their chin up to open the air way, Two fingers under the chin and one hand on the forehead, tilt the head back gently and open their mouth, pitch the nose and create a seal with your mouth around the other person's mouth , and then give the person 2 small breaths first, then continue by giving one breath every 5 seconds.
The right option is; B) are not composed of cells.
The single, MOST important reason why viruses are classified as non-living is that they are not composed of cells. The cell is the basic unit of structure and function in organisms. All living organisms are composed of one or more cells (according to the cell theory) and viruses do not have cells. Therefore, many scientists classify viruses as non-living.
Viruses are non-cellular microscopic infectious organism that are composed of two main parts; nucleic acid (DNA or RNA) and a protein coat that protects the nucleic acid. Viruses require a living cell (host) to reproduce and usually cause disease in the host organism.
