Homeostasis & Adaptations Review

The series shows a water solution containing dye molecules. Over time, the dye molecules move across a membrane toward equilibrium. Which will change most as the system moves toward equilibrium?

• the concentration of dye molecules

• the temperature of the water

• the shape of dye molecules

• the volume of the solution

Tags

NGSS.MS-PS1-2

Water enters a cell and waste material leaves a cell through the cell membrane. Based on this information, the cell membrane is

• semipermeable

• transparent

• rigid

• impermeable

Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?

• A cell membrane is surrounded by fluid.

• A cell membrane is semipermeable.

• A cell membrane holds organelles in place.

• A cell membrane is found in plant and animal cells.

Each beaker shown below contains an amphibian egg collected from one of four different locations.

Which of these beakers contains an egg that would shrink?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS1-2

Which of these would be a model of diffusion?

• a student passes through a revolving door

• two students pass by each other in a hallway

• two students bump into each other in a crowded subway car

• many students pass from a crowded room into an empty hallway

Which of these processes makes it possible for cells to take in water?

• osmosis

• mitosis

• photosynthesis

• respiration

Root cells of plants take in some minerals from the surrounding soil by spending energy. After the plant obtains enough minerals to maintain health, the plant will continue to absorb minerals from the soil. Which reason best explains why root cells need to spend energy in order to transport some minerals into cells?

• Root cells are unable to use sunlight energy for mineral uptake.

• Mineral concentration is higher in root cells than in the surrounding soil.

• Cell membrane pores in roots are too small for passive uptake of minerals.

• Cell membranes in roots lack proteins for the passage of minerals.

Tags

NGSS.HS-LS1-3

Which of these is MOST likely malfunctioning if a cell is unable to import substances it requires toprocess chemical energy?

• cell membrane

• endoplasmic reticulum

• Golgi body

• nuclear membrane

Tags

NGSS.MS-LS1-2

Cell membranes are described as selectively permeable. Four students were asked to explain what this means and provided the answers given below.

Student 1: Cell membranes prevent all materials from entering the cell.

Student 2: Cell membranes only provide structural support for the cell.

Student 3: Cell membranes regulate which substances can enter and exit the cell.

Student 4: Cell membranes allow water and water-soluble substances to enter the cell.

Which student correctly identified the function of the selectively permeable membrane?

• student 1

• student 2

• student 3

• student 4

Tags

NGSS.MS-LS1-2

What will happen to a cell that is placed in a hypotonic saline solution?

• Water will exit the cell causing it to shrink.

• Water will enter the cell causing it to swell.

• Salt will exit the cell causing it to shrink.

• Salt will enter the cell causing it to swell.

Tags

NGSS.MS-LS1-2