Biology Foundations Test Study

A scientist claims that he has protected animal test subjects from a newly mutated virus using an experimental vaccine.

The experimental vaccine was injected into five animal test subjects. The scientist also injected a placebo vaccine into five other animal test subjects.

One month later, all of the test subjects were exposed to the mutated virus. The subjects that received the vaccination showed no sign of the disease and blood tests confirmed the presence of antibodies against the disease, but the subjects given the placebo developed symptoms of this condition.

Why did one group have a placebo injected before being exposed to the virus?

• They were part of the experimental group

• They would be protected from the disease

• They would be exposed to a weaker form of the virus

• They were part of the control group

tendency of molecules of the same kind to stick to one another

• cohesion

• adhesion

• solution

• polar molecule

What two elements make up water?

• Helium and oxygen

• Hydrogen and oxygen

• helium and carbon

• oxygen and carbon

Tags

NGSS.MS-PS1-1

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.
• Water has a high heat capacity.
• Water acts as a buffer.
• Water is non-polar.

Tags

NGSS.HS-ESS2-5

NGSS.HS-PS3-4

What word describes when water is attracted to other substances?

• cohesion

• adhesion

• capillary action

• surface tension

An acid is a substance that releases

• H+ is water
• H- in water

On the pH scale higher numbers indicate

• acids
• bases

Which property allows solid ice to float in liquid water?

• High specific heat

• High boiling point

• Adhesion

• Density

Neutralization happens when acids and base combine

• True
• false

Glycerol and fatty acids are the monomers of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids