What organelle in the amoeba and paramecium is an adaptation to living in a hypotonic environment?
contractile vacuole
What shape are onion cells?
rectangular
Bacteria have vacuoles.
False
A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from which of the following?
either a plant or an animal
A cellular diameter of 40 micrometers is equivalent to:
0.04 mm
What is the function of vacuoles in plant cells?
storage
Some amoeba can be pathogenic to humans.
true
What is the method of motility of paramecium?
cilia
Amoeba survive in what type of habitat?
aqueous environment
The part of the onion you eat (and the part that was used for study in lab):
grows below ground.
Eukaryotic cells are typically larger than prokaryotic cells because:
their internal membrane system allows compartmentalization of functions and extra surface area for nutrient exchanged and placement of enzymes.
What is the stinging organelle of paramecium that assists it in capturing large prey?
trichocyst
Which of the following organelles enables the Euglena to be photoautotrophic?
Answers:
central vacuole
lysosomes
chloroplasts
mitochondria
tonoplast
chloroplasts
What is the thick layer that surrounds each onion cell?
Answers:
interstitial space
the plant circulatory system
cell membrane
cell wall
cell wall
How does the composition of bacterial cell walls differ from that of plant cell walls?
Answers:
Bacteria have an extensive network of crosslinked teichoic acids in their cell walls, while plant cell walls are composed primarily of cellulose.
Bacteria have cell walls composed of peptidoglycan, while plant cell walls are composed primarily of cellulose.
Bacteria have cell walls composed of chitin, while plant cell walls are composed primarily of cellulose.
Both plants and bacteria have cell walls composed of cellulose; the cellulose fibers are more extensively crosslinked in bacteria than in plant cells.
- Question 20 2 out of 2 points
Bacteria have cell walls composed of peptidoglycan, while plant cell walls are composed primarily of cellulose
Paramecium are predators of:
Answers:
invertebrates.
insects.
plants.
bacteria
bacteria
What was the genus and species of amoeba you studied in lab?
Entamoeba histolytica
Achanthamoeba
Naegleri fowleri
Amoeba proteus
Amoeba aurelia
Amoeba proteus
What is the genus and species of the potentially deadly amoeba that causes amoebic meningoencephalitis?
Amoeba caudatum
Acanthamoeba
Naegleri fowleri
Entamoeba histolytica
Amoeba proteus
Naegleri fowleri
In the absence of direct sunlight, the euglena might lose its:
chloroplasts.
flagella.
mitochondria.
food vacuoles.
chloroplasts.
Which organelle, within the paramecium, controls sexual reproduction?
nucleus
micronucleus
nucleolus
nucleoid region
micronucleus
Bacteria have cell walls.
True False
true
What is the mechanism by which Euglena move?
extension of cytoskeletal structures
flagella
cilia
amoeboid movement and pseudopods
flagella
What part of the onion plant carries out photosynthesis?
tubers
stolens
the roots
the bulb
all parts above ground
all parts above ground
How many flagella do Euglena have?
1
more than 2
0
2
2
Paramecium are heterotrophs. How do they obtain nutrients from their surroundings?
through the trichocyst
by releasing enzymes outside the cell to digest any available food sources in the immediate environment.
through their oral grooves.
by use of their contractractile vacuoles
through their oral grooves
By what mechanism do amoeba move?
:They secrete a mucopolysaccharide extracellularly that enable them to slide along moist surfaces.
They form pseudopods, and have cytoplasmic streaming.
They are ciliated organisms.
They are flagellated organisms.
They form pseudopods, and have cytoplasmic streaming
Amoeba are:
:anaerobic organisms
microaerophilic organisms.
aerobic organisms.
aerobic organisms.