Table of Contents
What is the origin of protist?
Protists originated from symbiotic associations of prokaryotes. Recently, but not yet widely popularised ideas even ascribe a symbiotic origin to the eukaryotic nucleus (Sogin, 1994). Evolution of protists is seen as a gradual process.
Why are protists so diverse?
Kingdom Protista is said to be the most diverse kingdom, because each of its members are so individual from each other. This miscellanous grouping causes the organisms in the kingdom to be very different from each other. …
How is protist caused?
Answer. When an infected mosquito bites someone to take a blood meal, protists in the mosquito’s saliva get into the person’s bloodstream.
What are the diversity of protists?
Diversity of Protists
| Group name . | Number of known extant species . | Potential number of species . |
|---|---|---|
| Foraminifera | > 10,000 | 15,000 |
| Acantharia | 160 | < 200 |
| Polycystinea | 700 to 1000 | 1,500 |
| Nucleohelea | 160 to 180 | 200 |
What is the taxonomy of a protist?
The cells of protists are highly organized with a nucleus and specialized cellular machinery called organelles. At one time, simple organisms such as amoebas and single-celled algae were classified together in a single taxonomic category: the kingdom Protista.
How do protists exhibit diversity?
Protists display highly varied cell structures, several types of reproductive strategies, virtually every possible type of nutrition, and varied habitats. Most single-celled protists are motile, but these organisms use diverse structures for transportation.
What Kingdom is the most diverse?
Why is the kingdom considered the most diverse kingdom? Protists are said to be the most diverse of all eukaryotic kingdoms because the organisms in the Protista kingdom are eukaryotic organisms that are not plants, animals, or fungi.
Are protists diverse?
Protists are a diverse collection of organisms. While exceptions exist, they are primarily microscopic and unicellular, or made up of a single cell. At one time, simple organisms such as amoebas and single-celled algae were classified together in a single taxonomic category: the kingdom Protista.
Is protist diverse?
Why are protists such a diverse group of organisms?
Protists are extremely diverse in terms of biological and ecological characteristics due in large part to the fact that they are an artificial assemblage of phylogenetically unrelated groups. Protists display highly varied cell structures, several types of reproductive strategies, virtually every possible type of nutrition, and varied habitats.
When did the eukaryotes diverge from protists?
Evolution of Eukaryotes | Back to Top The transition to eukaryotic cells appears to have occurred during the Proterozoic Era, about 1.2 to 1.5 billion years ago. However, recent genetic studies suggest eukaryotes diverged from prokaryotes closer to 2 billion years ago.
How are protist parasites harmful to other organisms?
Many protists are pathogenic parasites that must infect other organisms to survive and propagate. Protist parasites include the causative agents of malaria, African sleeping sickness, and waterborne gastroenteritis in humans. Other protist pathogens prey on plants, effecting massive destruction of food crops.
How are heterotrophs and protists able to reproduce?
Some heterotrophs absorb nutrients from dead organisms or their organic wastes, and others are able to use photosynthesis or feed on organic matter, depending on conditions. Protists reproduce by a variety of mechanisms.