WorksheetsBio 1.2.3 Unicellular Organisms
Total questions: 12
Worksheet time: 24mins
Which of the following is a typical example of a unicellular organism?
earthworm
bacteria
fungi
green algae
Which example represents chemotaxis?
An amoeba engulfs a food particle.
A paramecium removes excess water.
A euglena moves from a dark area towards a light source.
A bacterium swims towards higher concentrations of glucose.
How are flagella and cilia similar?
They both aid in movement.
They are both used for reproducing.
They are both hair-like projections that are used for digestion.
They are both used to shoot out trichocysts that paralyze potential prey.
Which helps a paramecium maintain homeostasis in aquatic environments?
contractile vacuole
macronucleus
mitochondria
eye spot
Phototaxis is movement in response to which stimulus?
light
sugar
chemicals
nutrients
To maintain homeostasis, a cell needs to expel some of its water. Which structures below would most likely help accomplish this task?
pseudopods
protein pumps
tunnel proteins
contractile vacuoles
Freshwater protists have a contractile vacuole that saltwater protists lack. What is the best explanation for this?
The saltwater protists cannot make their own food.
The saltwater protists use a flagellum to move instead.
The freshwater protists evolved after the saltwater protists.
Freshwater protists must keep a balance of water to maintain homeostasis.
What structure in bacteria protects the cell from injury and resists some antibiotics?
nucleus
cell wall
mitochondria
cell membrane
What primary function do flagella serve in bacteria?
gathering food
intake of fluids
directional movement
defense against attackers
Which is a primary function of a cilium?
movement
catching prey
sensing light
maintaining homeostasis
What is the function of an eyespot?
camouflage
trapping food
detecting light
photosynthesis
Which is the temporary structure amoebae use to move?
cilium
flagellum
pseudopod
contractile vacuole
