Table of Contents
- 1 Do protozoa have internal organelles?
- 2 What type of cell does a protozoan have?
- 3 Which of these belong to phylum protozoa?
- 4 Are protozoa Autotrophs or Heterotrophs?
- 5 Why are protozoa known as Heterotrophs?
- 6 How is the cytoplasm differentiated in a protozoa?
- 7 What makes a protozoa an eukaryotic micro-organism?
Do protozoa have internal organelles?
In protozoans the maintenance of the osmotic gradient between the cell cytoplasm and the environment is achieved by the contractile vacuole. These membrane-bound organelles are situated close to the plasma membrane. The number of these membrane-bound cell organelles depends on the feeding habits of the organism.
What cellular organelles are common to protozoa?
Organelles in Protozoa:
- Contractile vacuoles: Definition:
- Food vacuoles: They are temporary vacuoles and are universally present in holozoic Protozoan which take in whole or parts of other organism.
- Sensory vacuoles or Concretion vacuoles:
- Superficial vacuoles:
What type of cell does a protozoan have?
single celled organisms
Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. They live in a wide variety of moist habitats including fresh water, marine environments and the soil.
Which structure are not found in protozoa?
16 Cards in this Set
| Protists include: | algae and protozoa |
|---|---|
| organelles found in algae but not found in protozoa or fungi are the: | chloroplasts |
| The cytoskeleton: | anchors organelles, provides support, functions in movements of the cytoplasm, helps maintain cell shape |
| Filamentous fungi are called: | molds |
Which of these belong to phylum protozoa?
The organisms belonging to Phylum Protozoa are Volvox, Euglena, Giardia etc.
Do all protozoans have protein in their cell walls?
Protozoa are the animal-like protists. These unicellular eukaryotes lack cell walls. They are heterotrophic and feed on other microorganisms or on organic particles.
Are protozoa Autotrophs or Heterotrophs?
protozoan, organism, usually single-celled and heterotrophic (using organic carbon as a source of energy), belonging to any of the major lineages of protists and, like most protists, typically microscopic. All protozoans are eukaryotes and therefore possess a “true,” or membrane-bound, nucleus.
What phylum is protozoa in?
As a phylum under Animalia, the Protozoa were firmly rooted in a simplistic “two-kingdom” concept of life, according to which all living beings were classified as either animals or plants.
Why are protozoa known as Heterotrophs?
Protozoa are known as heterotrophs because they depend on other organisms for their food.
What kind of organelles are found in protozoa?
Protozoa possess typical eukaryotic organelles and in general exhibit the typical features of other eukaryotic cells. For example, a membrane bound nucleus containing the chromosomes is found in all protozoan species.
How is the cytoplasm differentiated in a protozoa?
In most protozoa the cytoplasm is differentiated into ectoplasm (the outer, transparent layer) and endoplasm (the inner layer containing organelles); the structure of the cytoplasm is most easily seen in species with projecting pseudopodia, such as the amebas. Some protozoa have a cytosome or cell “mouth” for ingesting fluids or solid particles.
How many food vacuoles does a protozoan have?
Protozoans have transitory food or digestive vacuoles. The number of these membrane-bound cell organelles depends on the feeding habits of the organism. Some species may have many, whereas others may contain only one or two at any one time.
What makes a protozoa an eukaryotic micro-organism?
Due to the extreme diversity of the protozoa the only feature common to all protozoa is that they are unicellular eukaryotic micro-organisms. Protozoa possess typical eukaryotic organelles and in general exhibit the typical features of other eukaryotic cells.