SC 6 L 14 3

Students investigated how kidneys function by creating four model cells out of dialysis tubing. Each model cell originally had a mass of 10 grams. The students placed each model cell in a beaker, and each beaker had a different concentration of sugar in water. After 24 hours, they recorded the mass of the model cells. Their data appear in the table.

What happened to cell W?

• It increased in mass because water diffused into the model cell.

• It decreased in mass because water diffused into the model cell.

• It increased in mass because water diffused out of the model cell.

• There was no change in mass.

Tags

NGSS.MS-LS1-5

Base your answer to the question on the diagram below and on your knowledge of biology. The diagram represents two solutions, A and B, separated by a selectively permeable membrane. Which statement best describes the outcome after 20 minutes?

• Solution A will contain approximately the same number of glucose molecules as solution B.

• Solution A will contain all of the water molecules.

• Solution B will remain unchanged.

• Solution B will lose all of the glucose molecules to solution A.

The diagram below represents two single-celled organisms.

These organisms carry out the activities needed to maintain homeostasis by using specialized internal

• tissues

• organelles

• systems

• organs

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The diagram below represents an activity that occurs in the human body.
This diagram best illustrates

• active transport

• maintenance of homeostasis

• synthesis of nutrients

• differentiation

and B below represent two different slide preparations of elodea leaves. Elodea is a plant found in streams and ponds in New York State.

The water used on slide A contained 1% salt and 99% water. The salt solution used on slide B contained 6% salt and 94% water. Elodea cells normally contain 1% salt.

Five minutes after the slides were prepared, a student using a compound light microscope to observe the cells in leaves A and B would most likely see that

• water had moved out of the cells of the leaf on slide A

• salt had moved out of the cells of the leaf on slide B

• salt had moved into the cells of the leaf on slide A

• water had moved out of the cells of the leaf on slide B

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which statement best describes what will most likely happen after several minutes?

• The liquid outside the model cell will change color.

• The contents of the model cell will change color.

• The model cell will shrink.

• The model cell will rupture.

Tags

NGSS.MS-LS1-2

The diagram shown represents changes in the sizes of openings present in leaves as a result of the actions of cells X and Y.The actions of cells X and Y help the plant to

• maintain homeostasis by controlling water loss

• store excess heat during the day and remove the heat at night

• absorb light energy necessary for cellular respiration

• detect changes in the biotic factors present in the environment

Jennifer is learning the parts of the cell and knows that there must be a structure responsible for maintaining the homeostasis of the cell. This structure is which of the following?

• Cell membrane

• Mitochondrion

• Nucleus

• Chloroplast

Tags

NGSS.MS-LS1-2

Living things maintain homeostasis by getting rid of waste. Which of the following is another way living things maintain homeostasis?

• Hiding from predators

• Attracting a mate

• Extracting energy from food

• Moving through their environment

Tags

NGSS.MS-LS1-7

A student observed a wet mount of some stained plant cells in the high-power field of a compound light microscope. Diagram A represents the general appearance of these cells. The student then added several drops of a liquid to the wet mount and continued the observations. Diagram B represents the general appearance of the cells a few minutes after adding the liquid.

The liquid that the student added to the wet mount was most likely

• salt water

• distilled water

• pond water

• tap water

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5