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The first were likely sponges. It allowed them to use specialized cells to move water to bring potential nutrients to other cells specialized in consuming them. It allowed other cells to create an external structure that enabled the first multicellular organism to form. By creating this group of different cells that worked together, it made it much more difficult for the prey to evade them. It allowed the formation of much more complex organisms. The ability to force water through a sort of filter may seem primitive compared to later adaptations but this was a weapon of mass destruction in its day.
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What are two common characteristics of fungus like protists?
Two common characteristics of fungus-like protists are their mode of nutrition, which involves absorbing nutrients from their surroundings, and their growth habit, where they often form multicellular, thread-like structures called hyphae.
What was the primary factor missing or billions of years that was necessary for protists to evolve?
The primary factor missing for billions of years was the development of complex multicellular organisms that could serve as hosts for endosymbiosis. This allowed for the evolution of more complex eukaryotic cells, leading to the emergence of protists.
Did animals evolve from protists?
Yes, it is believed that animals evolved from protists. Protists are a diverse group of eukaryotic organisms that are considered to be the ancestors of all animals, as well as other complex multicellular organisms. The transition from single-celled protists to multicellular animals occurred over millions of years through the process of evolution.
What protists are multicellular?
Most of the members of the Protist Kingdom are unicellular, however, there are a few species that, though simple, their structure and composition is multicellular, such as some species of algae, like the seaweed or 'kelp'.
Are protists mostly multicellular?
No, most protists are unicellular organisms. Some protists can form colonies or be multicellular, but the majority are single-celled.
Four kingdoms in multicellularity?
The four kingdoms in multicellularity are animals, plants, fungi, and protists. Animals are heterotrophic organisms with specialized cells and tissues. Plants are autotrophic organisms capable of photosynthesis. Fungi are either decomposers or parasites, and protists are a diverse group of eukaryotic organisms.
Is choanoflagellates a protists?
Yes, choanoflagellates are classified as protists. They are single-celled organisms that belong to the kingdom Protista and are closely related to animals, sharing a common ancestor. Choanoflagellates are characterized by their unique collar of microvilli surrounding a single flagellum, which they use for feeding and movement. Their study provides insights into the evolution of multicellularity in animals.
Why are protists considered advanced?
There are many ways in which protists are more advanced than bacteria. Protists possess a nucleus. Protists can also be unicellular or multicellular while bacteria is only unicellular.
What is a protists cell?
Eukaryotic. This means that it has advanced cell structure, including a nucleus. Protists were the first Eukaryotes.
What is a protists cell type?
Eukaryotic. This means that it has advanced cell structure, including a nucleus. Protists were the first Eukaryotes.
What is complex life?
Complex life refers to organisms that exhibit intricate structures and functions, typically characterized by multicellularity, specialized tissues, and advanced cellular organization. This includes plants, animals, fungi, and certain protists. Unlike simple life forms, such as bacteria and archaea, complex life exhibits higher levels of biological organization and often involves sophisticated behaviors and interactions within ecosystems. The evolution of complex life is a significant milestone in the history of life on Earth, enabling greater adaptability and ecological diversity.
During the evolution of protists it is hypothesized that what occurred?
B and C only for plato users
What are two common characteristics of fungus like protists?
Two common characteristics of fungus-like protists are their mode of nutrition, which involves absorbing nutrients from their surroundings, and their growth habit, where they often form multicellular, thread-like structures called hyphae.
Describe margulis' theory about the evolution of protists?
Lynn Margulis proposed the endosymbiotic theory, suggesting that eukaryotic cells originated from the incorporation of prokaryotic cells through symbiosis. She specifically highlighted the role of bacterial ancestors, such as mitochondria and chloroplasts, in the evolution of protists. According to Margulis, these symbiotic relationships contributed to the complexity and diversification of protists.
How long have protists been on earth?
Protists are some of the smallest form of life. Some are so insubstantial that they do not leave a trace in the fossil record, but about fifty percent of protists species are represented as microfossils. The oldest protist microfossils indicate that they were present on earth approximately 1.5 billion years ago.
Are protists easy to classify?
No, protists are not easy to classify due to their diversity in terms of size, structure, and behavior. They represent a wide range of organisms with varying characteristics, making their classification complex and often requiring advanced techniques.
What was the primary factor missing or billions of years that was necessary for protists to evolve?
The primary factor missing for billions of years was the development of complex multicellular organisms that could serve as hosts for endosymbiosis. This allowed for the evolution of more complex eukaryotic cells, leading to the emergence of protists.
