10 Questions
Which statement best describes the Cell Theory?
All cells come from preexisting cells
What differentiates prokaryotic cells from eukaryotic cells?
Eukaryotic cells contain organelles
What is a defining characteristic of archaea?
They live in extreme environments
Which type of organisms are mostly unicellular and contain organelles?
Protists
What is the primary function of fungi?
Absorbing food
Which kingdom includes both multicellular and unicellular organisms?
Protista
What distinguishes eukaryotic cells from prokaryotic cells?
Eukaryotic cells have a nucleus
What differentiates bacteria from archaea?
Bacteria have a cell wall while archaea lack it
What is the primary means by which plants obtain their food?
Photosynthesis
Which category does not include any unicellular organisms?
Fungi
Study Notes
- Characteristics of living organisms: growth and development, reproduction, respond to stimuli, maintain internal conditions (homeostasis), use energy
- Cell Theory: all living things are made up of one or more cells, cells are the basic unit of life, all cells come from preexisting cells
- Cell Theory origin: advancement of microscope technology, collaboration and competition among Western scientists
- Prokaryotic Cells: single-celled organisms, no nucleus, no organelles, enclosed in a cell wall, domain of Bacteria and Archaea
- Eukaryotic Cells: have a nucleus, typically larger and more complex organisms, multicellular, domain includes Protists, Fungi, plants, and animals
- Cell Wall: prokaryotic cells have a cell wall, eukaryotic cells have a cell membrane
- Cell Types: Archaea (unicellular prokaryotes, around 20,000 species), Bacteria (unicellular prokaryotes, around 30,000 species), Protists (unicellular and multicellular, around 100,000 known species), Fungi (mostly multicellular, over 6 million known species), Plants (around 382,000 known species), Animals (over 6 million species, divided into mammals, birds, reptiles, amphibians, and insects)
- Organelles: subcellular structures that have specific jobs in a cell.
Test your knowledge on the characteristics of living things and the history and principles of cell theory. Explore concepts such as organization by cells, growth and development, reproduction, response to stimuli, homeostasis, and the fundamental principles of the cell theory.
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