Bio 6 Lab Exam 1 Review

What is true about science? Check all statements that apply.

• • It generally contains bias.

• • It is a single entity.

• • It is an orderly process.

• • It proceeds by posing and answering questions.

• 
  

  Its results in scientific experiments that are repeatable.

Why is phenol red added to the test tubes?

• Phenol red provides carbon atoms for photosynthesis.

• Phenol red detects the release of oxygen.

• Phenol red participates with the light reactions of photosynthesis.

• Phenol red is a pH indicator.

The _________ hypothesis states there will be no difference

between the control and experimental groups in an experiment.

• alternative

• null

What does it mean if two treatments are said to be "significantly different"? Check all that apply.

• • The means of each sample plus or minus half the variance do not overlap.

• • The difference was very likely not due to natural variation.

• • The means of each sample plus or minus half the variance do not overlap.

• • The ranges overlap.

When adding Phenol red to a solution, acidic solutions will appear what color?

• Yellow

• Pinkish-red

An example of a null hypothesis is

• • The water level in Lake Michigan has increased in the past 12 months.

• • Green frogs have a more distinct call than grey tree frogs.

• • Medication X will not impact the size of a tumor.

• • Changes in weather patterns seem to increase the incidence of migraines.

Why did carbon dioxide levels change in the tube with Elodea?

• Carbon dioxide is a reactant in photosynthesis

• Carbon dioxide is a reacting with phenol red

• Carbon dioxide is dispersing into the atmosphere

• Carbon dioxide is a product of photosynthesis

2. Which key term describes the movement of particles from a high to low concentration?

• a) Diffusion
• b) Osmosis
• c) Brownian Motion
• d) Absolute zero �

3. Identify the states of matter where Brownian Motion can occur.

• a) Solid, liquid, gas
• b) Liquid, gas
• c) Solid, gas
• d) Solid, liquid

4. What is the major problem with trying to observe Brownian Motion?

• a) Molecules are moving too fast
• b) Molecules are moving too slow
• c) Molecules are too big to observe
• d) Molecules are too small to observe