LE Mid Term Review

A company that makes a popular multivitamin wanted to determine if its multivitamin had side effects. For its initial study, the company chose 2,000 people to take one of its multivitamin tablets per day for a year. Company scientists surveyed participants to determine if they had experienced any side effects. The biggest problem with this procedure is that

• only one brand of vitamin was tested

• the study lasted only one year

• the sample size was not big enough

• no control group was used

A biologist formulates a hypothesis, conducts experiments to test his hypothesis, makes careful observations, and keeps accurate records of his findings. To complete this process, the biologist must

•  fit the data to support the hypothesis

• eliminate data that does not support the hypothesis

• write a research paper that explains your theories before conducting your

       experiments, to obtain sources of financing

• evaluate the findings and, if necessary, alter the hypothesis based on its

        findings and test the new hypothesis

Tags

NGSS.MS-LS2-1

What is the volume of water represented in the graduated cylinder shown below?

• 10.3 ml

• 13.0 ml

• 14.0 ml

• 15.0 ml

What is the approximate length of the earthworm shown in the diagram below?

• 9 mm

• 90 mm

• 10.6 cm

• 106 cm

Information about which two Lettered parts are needed to determine the total magnification of an object seen with the microscope in the position shown?

• A and B

• A and C

• B and C

• E and D

Which lettered part should be used to focus the image while using high power?

• E

• A

• D

• C

 The diagram shows an enzyme and four different molecules. The enzyme most likely affect reactions involving

• molecule A, only

• molecule C, only

• molecules B and D

• molecules A and C

The diagram represents a portion of a DNA molecule. The letters represent different types of

• sugar molecules

• bases

• enzymes

• proteins

Tags

NGSS.HS-LS1-1

Due to overfishing, the number of fish in the ocean could decrease drastically. This will cause:

• an increase in ocean stability

• an increase in the salt content of the oceans

• a decrease in the stability of the oceans

• a decrease in available oxygen in the oceans

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-1

NGSS.MS-LS2-5

NGSS.MS-LS2-4

What substance can enter a cell by diffusion without having to be digested?

• water

• protein

• starch

• fat