21 Questions
Which characteristic of life involves maintaining a constant internal environment?
Maintaining homeostasis
What is the smallest unit of life contained within a plasma membrane?
Cell
What is a cohesive group of similar cells performing a specific function called?
Tissue
Which characteristic of life involves the ability to adapt to the environment?
Adapting to the environment
What is a structure composed of more than one tissue called?
Organ
What is the science that deals with the study of all living things called?
Biology
What is the broad biological function performed by a group of organs called?
Organ system
What is the meaning of homeostasis?
Maintaining a relatively constant internal environment
How is body warmth maintained in humans?
Unconscious blood vessel constriction and conscious selection of appropriate clothing
What is the natural hierarchy of biological organization?
Atoms, molecules, cells, tissues, organs, organ systems, organism
What is taxonomy in biology?
Branch of science classifying organisms into groups with similar characteristics
What does artificial classification in biology use to identify organisms?
A system of names to identify organisms and show their relationships
What does natural organization in biology emerge from?
The structure of organisms
What is the purpose of taxonomy in biology?
To classify organisms into groups with similar characteristics
What is the smallest unit of life according to biological organization?
Cells
What are the broad biological function performed by a group of organ systems called?
Organism
What is the meaning of 'homeostasis' in Greek?
Staying the same
What does artificial classification in biology use to group organisms?
Similar characteristics
Humans are considerd as?
Eukarya
What is the correct order of taxonomy for modern humans?
Kingdom – Animalia, Phylum – Vertebrata, Class – Mammalia, Order – Primates, Family – Hominidae, Genus – Homo, Species – sapiens
Which taxonomic level includes ONLY Homo sapiens (modern day humans)?
Genus
Study Notes
Characteristics of Life
- Homeostasis involves maintaining a constant internal environment
- Adaptation involves the ability to adapt to the environment
Levels of Organization
- The smallest unit of life is a cell, contained within a plasma membrane
- A group of similar cells performing a specific function is called tissue
- A structure composed of more than one tissue is called an organ
- A group of organs performing a broad biological function is called an organ system
- The natural hierarchy of biological organization is: cell → tissue → organ → organ system
Taxonomy and Classification
- Taxonomy is the science that deals with the study of all living things
- Artificial classification in biology uses characteristics to identify and group organisms
- Natural organization in biology emerges from evolutionary relationships
- The purpose of taxonomy in biology is to understand and classify living organisms
- Humans are considered as Homo sapiens
- The correct order of taxonomy for modern humans is: Domain: Eukarya, Kingdom: Animalia, Phylum: Chordata, Class: Mammalia, Order: Primates, Family: Hominidae, Genus: Homo, Species: Homo sapiens
- The taxonomic level that includes ONLY Homo sapiens (modern day humans) is Species
Homeostasis
- Homeostasis is the maintenance of a constant internal environment
- In humans, body warmth is maintained through homeostasis
- The meaning of 'homeostasis' in Greek is "remaining the same"
Test your knowledge of biology with this quiz on the characteristics of life. Explore the fundamental concepts that define living organisms and their organization. See how well you understand the key elements that distinguish living things from non-living entities.
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