1.2.3 Unicellular Adaptations

The bacterium E. coli responds and moves toward a sudden high concentration of sugar added to the medium it lives in. Which describes this response?

• aerotaxis

• phototaxis

• chemotaxis

• thigmotaxis

What is the function of an eyespot?

• camouflage

• trapping food

• detecting light

• photosynthesis

To maintain homeostasis, a cell needs to expel some of its water. Which structure below would most likely help accomplish this task?

• pseudopods

• protein pumps

• tunnel proteins

• contractile vacuole

Tags

NGSS.HS-LS1-3

Which organelle is used to capture and engulf the food into the unicellular organism?

• cilia

• flagella

• pseudopod

• contractile vacuole

Which are hair-like projections used for locomotion by unicellular organisms?

• cilia

• flagella

• pseudopods

• contractile vacuole

Which is used by the amoeba for locomotion?

• cilia

• flagella

• pseudopod

• contractile vacuole

Which of the following can be described as a long whip-like structure that the Euglena uses for movement?

• cilia

• flagella

• pseudopod

• contractile vacuole

A unicellular organism that produces glucose through photosynthesis would most likely contain which structure?

• chloroplasts

• cilia

• eyespots

• pseudopods

Tags

NGSS.MS-LS1-6

Which action exemplifies phototaxis?

• an amoeba engulfs a food particle

• a paramecium removes excess water

• a euglena swims towards a source of light

• a bacterium moves towards higher concentrations of glucose

Which helps a paramecium maintain homeostasis in aquatic environments?

• contractile vacuole

• macronucleus

• mitochondria

• eyespot