Answer:
A. amount of food available
Explanation:
An experiment consists of two types of variables, independent and dependent. Value of independent variable is decided by the person doing the experiment and is independent of experimental conditions. Value of dependent variable is dependent on the independent variable. It can not be altered by the person doing experiment.
Here, it is given that mice receive variable amount of food each day and their lifespan is recorded. Since the amount of food is decided already it is the independent variable. The lifespan is expected to depend on the amount of food hence it is the dependent variable.
Can help prevent heart attacks
Avogadro's number tells us there are 6.022 x 1023 molecules of water per mole of water. So, next we calculate how many molecules there are in a drop of water, which we determined contains 0.002775 moles: molecules in a drop of water = (6.022 x 1023 molecules/mole) x
Most vaccines will cause your body to produce cells that in turn produce thier own antibodies in order to fight off future illnesses later on whereas antibiotics provide a quick dosage of antibodies with no prolonged immunity and in fact kill off alot of the good bacteria in your body
Answer:
Biologists study life at all levels of organization and complexity:Atoms
Genes
Atoms
Molecules
Cells
Tissues
Organs
Organisms
Explanation
Populations
Communities
Ecosystems
Earth
Solar Systems
Galaxies
They can also study specific things within those classifications, such as specific organs, the effects of pollution on ecosystems, etc.:
