Variety Of Living Organisms
Akopọ
Life on Earth ranges from microscopic bacteria that thrive in boiling hot springs to giant redwood trees that stand for thousands of years. Biologists organise this staggering diversity into groups based on shared features, splitting organisms into eukaryotes and prokaryotes and then asking which ones cause disease.
In this lesson you will compare the four eukaryotic kingdoms (animals, plants, fungi and protoctists), explore how prokaryotic bacteria differ from them, and learn what makes an organism a pathogen. These distinctions appear throughout the biology section of the Double Award and form the foundation for topics on cells, disease and ecology.
Awọn Afojusun
- Describe the common features shown by eukaryotic organisms: plants, animals, fungi and protoctists
- Describe the common features shown by prokaryotic organisms such as bacteria
- Understand the term pathogen and know that pathogens may include fungi, bacteria, protoctists and viruses
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- Which kingdom contains organisms with cell walls made of chitin? A) Plants B) Animals C) Fungi D) Prokaryotes Answer: C
- What is the main difference between eukaryotic and prokaryotic cells? A) Prokaryotic cells have a cell wall B) Eukaryotic cells have a membrane-bound nucleus C) Prokaryotic cells are always multicellular D) Eukaryotic cells have no DNA Answer: B
- Which of these is a protoctist? A) Yeast B) Lactobacillus C) Plasmodium D) Mushroom Answer: C
- Bacteria have genetic material in the form of: A) Linear chromosomes inside a nucleus B) A circular chromosome in the cytoplasm C) RNA only, with no DNA D) DNA inside mitochondria Answer: B
- Which statement about pathogens is correct? A) All bacteria are pathogens B) Viruses can only reproduce inside living cells C) Fungi never cause disease D) Protoctists are always beneficial Answer: B
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Prokaryotic Cells
Name examples of prokaryotic and eukaryotic organisms
"Biology: Prokaryotic Cells" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/4-2-prokaryotic-cells. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Fungal Parasites and Pathogens
Describe fungal parasites and pathogens of plants
"Biology: Fungal Parasites and Pathogens" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/24-4-fungal-parasites-and-pathogens. Access for free at https://openstax.org/books/biology/pages/1-introduction
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