What is the structure and function of protists?
What is the structure and function of protists?
Protists: Structures and Functions
| A | B |
|---|---|
| nucleus | controls life functions |
| cytoplasm | gives the cell its shape |
| cell membrane | controls what enters and exits the cell |
| contractile vacuole | gets rid of excess water |
What is the structure of protist cells?
Protists are a diverse collection of organisms. While exceptions exist, they are primarily microscopic and unicellular, or made up of a single cell. The cells of protists are highly organized with a nucleus and specialized cellular machinery called organelles.
What are the functions of protist?
Protists function at several levels of the ecological food web: as primary producers, as direct food sources, and as decomposers. In addition, many protists are parasites of plants and animals and can cause deadly human diseases or destroy valuable crops.
What are the features of the protist cell?
Protists have nuclear membranes around their DNA. They also have other membrane-bound organelles. Many protists live in aquatic habitats, and most are motile, or able to move. Protists have complex life cycles that may include both sexual and asexual reproduction.
What is the cell wall of protista?
Protista. Protists are single-celled and usually move by cilia, flagella, or by amoeboid mechanisms. There is usually no cell wall, although some forms may have a cell wall. They have organelles including a nucleus and may have chloroplasts, so some will be green and others won’t be.
What is the shape of a protist?
These protists are unicellular algae (or plant-like protists) and come in numerous different shapes. From cylindrical to triangle to oval to star, diatoms earn an A+ when it comes to cell shapes!
What are 5 characteristics of protists?
A few characteristics are common between protists.
- They are eukaryotic, which means they have a nucleus.
- Most have mitochondria.
- They can be parasites.
- They all prefer aquatic or moist environments.
What are cell walls made of in Protista?
The exact composition of the cell wall varies with the species of protist. Some protists have cell walls that are made of cellulose, but others have cell walls made of sugars other than glucose, modified sugars, or proteins.
What organelles are in a protist cell?
The organelles in protists include things like ribosomes, which are the organelles responsible for synthesizing all the proteins the protist will need; mitochondria, which are the organelles responsible for turning food into energy the cell can use; and chloroplasts, which are the organelles that are able to capture …
Does a protist have a cell wall?
What is the cell structure of a typical protist?
Characteristics of Protists Identify the common characteristics of protists. There are over 100,000 described living species of protists, and it is unclear how many undescribed species may exist. Cell Structure. The cells of protists are among the most elaborate of all cells. Motility. Metabolism. Life Cycles. Habitats.
What are the functions of the cell structure?
The cell structure is defined by the cell membrane, the cytoplasm, and the nucleus. A cell is the smallest unit of life and its structure helps it to work as the basic building block of biology. The cell function is to keep all of the functions of the body performing as intended.
What are the functions of protists?
The roles of protists include producing and using energy, recycling living systems into constituent nutrients, acting as biological control agents, synthesizing oxygen, and engaging in symbiotic relationships. Protists have commercial roles in the pharmacological, agricultural and biomedical research industries.
What is the cell structure of Protista?
The kingdom Protista consists of unicellular, colonial and multicellular organisms that contain a nucleus enclosed in a membrane. Another organelle found in protists, which are also eukaryotes, is the mitochondria.
