What is the general characteristics of protista?
Protista characteristics are extremely broad with exceptional variation among individual species of protists. All protists are eukaryotes, which means they contain a nucleus, and have sorted organelles like plastids and mitochondria. Most protists are unicellular although some are simple multicellular organisms.
What is Protoctista?
The Kingdom Protoctista comprises the eukaryotic microorganisms and their immediate descendants: all algae, including the seaweeds, undulipodiated (flagellated) water molds, the slime molds and slime nets, the traditional protozoa, and other even more obscure aquatic organisms.
What are the characteristics and structures of protists?
Protist cells may contain a single nucleus or many nuclei; they range in size from microscopic to thousands of meters in area. Protists may have animal-like cell membranes, plant-like cell walls, or may be covered by a pellicle.
What are the three types of protists and their characteristics?
Lesson Summary
- Animal-like protists are called protozoa. Most consist of a single cell.
- Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed.
- Fungus-like protists are molds. They are absorptive feeders, found on decaying organic matter.
Why do biologists consider kingdom Protoctista as a Polyphyletic group of organisms?
Kingdom protista is considered as polyphyletic group becausethey Have many Characters of their ancestors and the word polyphyletic means those organisms which have many ancestors and because is protoctists have characters of Animals, plants and Fungi so that why they are considered as polyphyletic group.
What are some of the characteristics of a protist?
Protists vary greatly in organization. While many protists are capable of motility, primarily by means of flagella, cilia, or pseudopodia, others may be nonmotile for most or part of the life cycle. … Are protists asexual or sexually? Protists reproduce asexually by budding and binary fission.
What is the function of the pellicle in a protist?
The pellicle functions like a flexible coat of armor, preventing the protist from being torn or pierced without compromising its range of motion. Protists exhibit many forms of nutrition and may be aerobic or anaerobic.
What are the stages of phagocytosis in protists?
Protist metabolism: The stages of phagocytosis include the engulfment of a food particle, the digestion of the particle using enzymes contained within a lysosome, and the expulsion of undigested materials from the cell.