- Yeast have been used in the production of beer, bread. - Some fungi could cause diseases and infections. - Fungi are the causes of molds. - Along with bacteria, act as decomposers in the nature.
Some of the protists cause human disease. Most of this kind of protists live in the intestinal tract or blood streams.
- Can be either sexual or asexual. - Sexual-fusion of two nuclei. - Asexual-direct fragmentation, vegetative spores budding.
- A sexual reproduction - Reproduces by binary fission once it grows to a certain size.
It can be motile or not. However, in the strict sense as fungi are currently defined, only those organisms that produce non motile spores and gametes are classified as fungi.
Most protists have motility. This is the ability to move. Protists have three types of appendages for movement.
Some fungi affect human health in various way and it can cause food corruption and human animal disease.
Fungi play vital roles in the biosphere. They are essential to the recycling of nutrients in all terrestrial habitats because they are the dominant decomposers of the complex components of plant debris, such as cellulose and lignin.
Algae can cause algae pollution in eutrophic waters, and it is not good for us. Example : Red Tide – They produce a toxin that can become concentrated in the tissues of shellfish (clams, mussels, oysters) – The toxin affects the nervous system causing illness, paralysis, or death of humans, fish and other marine animals.
We can say life on Earth depends on the protists because they supply us with oxygen, are critical organisms in food chains, and recycle important nutrients for other life forms to use.
- They are absorptive heterotrophs. - Digest food using enzymes and then absorb it. - Absorb food from surroundings through their cell walls.
Obtain food and get energy from sunlight through photosynthesis.
Most fungi are multicellular organisms. They display two distinct morphological stages: the vegetative and reproductive.
- Multicellular, eukaryotic organisms ( except single-celled yeast) - Has cell walls composed of chitin
- Unicellular or multicellular eukaryotes. - Have nuclei and membrane-bound organelles。 - Mainly autotrophic.