Prokaryotes And Unicellular Organisms

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Characteristics can classify organisms into 5 key groups called the 5 kingdoms:
- Protoctista: These are mainly unicellular organisms that also have a nucleus. Some examples of protoctista are paramecium, amoeba and unicellular algae.
-Prokaryotes: These are also unicellular organisms like protoctista but unlike them, they do not have a nucleus. An example of a Prokaryote is bacteria. Some prokaryotes are able to make their own food which makes them more self-sufficient. These types of prokaryotes are called autotrophic. Although there are some that cannot produce their own food; this type of prokaryotes is called heterotrophic.
-Fungi: Have no cell walls in their structure but they are multicellular. Fungi also don’t have chlorophyll, saprophytic feeders. Fungi are heterotrophic organisms therefore they are
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Plantae are multicellular organisms and just about all plants are classified as plantae. This consists of cacti or trees.
-Animalia: They are almost the opposite of Plantae due to animalia not having a cell wall or chlorophyll. Animalia are heterotrophic organisms and often be a predator and pray in the food web. These animalia are examples of mammals, fish and birds.
There are also two more ways to classify organisms. Wither they are a vertebrate or an invertebrate. A vertebrate is an organism which has a backbone. Advantages of having a backbone are that it means that they are faster than organisms which do not have a backbone and they tend to be stronger and more resilient. Examples of organisms which do have a backbone (vertebrates) are humans, birds, lion’s dogs and cats.
Invertebrates are organisms which do not have a backbone. They tend to be weaker than vertebrates and smaller. Examples of invertebrates are arachnids and insects. They also tend to be slower than vertebrates and their organs are less protected and they are also more prone to

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