Because they are parasitical. The plasmodium protists causes malaria by invading red blood cells for its nutrition.
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Some protists have them. Algae are some protists .
Algae and bacteria. They may be small, but they are living and not plants or animals.
Because it shields living organisms from some harmful radiation from the Sun
Depends.. 95% of all microorganisms are helpful. Most protists are usually helpful.
Some of them are, however, there are many microscopic organisms that are not harmful, some of which you could not survive without.
There are harmful to all organisms, but some bacteria are helpful in many ways.
These protists share many characteristivd with Fungi. However, because of their differences from Fungi they are classified as protists. Funguslike protists play a valuable role in the ecosystem. They break down dead plant and animal matter, making the nutrients from these dead orgainsms available for living organisms. While some slime molds and water molds are benefical, many others can be very harmful. Many fuguslike protsts attack and consume living plants.
Protists can be harmful as some species can cause diseases such as malaria and giardiasis. However, they can also be beneficial as they play important roles in marine ecosystems as primary producers and in nutrient cycling. Some protists are also used in research and biotechnology applications.
Most protists are unicellular organisms, but some are multicellular. These organisms are bigger than bacteria and contain a nucleus.
No, there are some photosynthetic protists and some photosynthetic bacteria.
Some amoebas are parasites, damaging the human body.