10 Questions
What is the estimated number of living animal species as of 2022?
7.77 million
Which clade includes animals with a bilaterally symmetric body plan?
Bilateria
What is the size range of animals mentioned in the text?
8.5 micrometres to 33.6 metres
What is the scientific study of animals known as?
Zoology
What do animals grow from during embryonic development?
Hollow sphere of cells, the blastula
What is a unifying theme in the field of biology?
Evolution
What is the fundamental unit that all organisms are made up of?
Cells
What allows organisms to move, grow, and reproduce?
Energy processing
At what levels of organization can biologists study life?
From molecular biology to the evolution of populations
What do biologists use to make observations and pose questions?
The scientific method
Study Notes
Animal Species
- The estimated number of living animal species as of 2022 is approximately 8.7 million.
Body Symmetry
- The clade that includes animals with a bilaterally symmetric body plan is Bilateria.
Animal Size Range
- The size range of animals mentioned in the text varies from a few micrometers to several meters.
Study of Animals
- The scientific study of animals is known as Zoology.
Embryonic Development
- Animals grow from blastulas during embryonic development.
Unifying Theme in Biology
- The unifying theme in the field of biology is the study of life and its processes.
Fundamental Unit of Organisms
- The fundamental unit that all organisms are made up of is cells.
Organism Functions
- Energy allows organisms to move, grow, and reproduce.
Levels of Organization
- Biologists can study life at multiple levels of organization, including molecular, cellular, tissue, organ, organism, population, community, ecosystem, and biosphere.
Scientific Tools
- Biologists use observations, questions, and the scientific method to make observations and pose questions.
Test your knowledge of the animal kingdom with this quiz! Explore the diversity of multicellular, eukaryotic organisms and their unique characteristics. From different species to reproductive methods, challenge yourself with questions on animal biology and behavior.
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