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Questions and Answers
Which clade includes animals with a bilaterally symmetric body plan?
Which clade includes animals with a bilaterally symmetric body plan?
- Protostomes
- Deuterostomes
- Radiata
- Bilateria (correct)
What is the estimated number of living animal species as of 2022?
What is the estimated number of living animal species as of 2022?
- 2.16 million (correct)
- 1.5 million
- 4.2 million
- 3.5 million
During which period did the Cambrian explosion, where many modern animal phyla became established, begin?
During which period did the Cambrian explosion, where many modern animal phyla became established, begin?
- Around 539 million years ago (correct)
- Around 1 billion years ago
- Around 200 million years ago
- Around 100 million years ago
What is the approximate range in length of animals mentioned in the text?
What is the approximate range in length of animals mentioned in the text?
Which scientific study is known as the study of animals?
Which scientific study is known as the study of animals?
What is the primary purpose of working animals?
What is the primary purpose of working animals?
Which animal is an example of a service animal trained to execute specialized tasks?
Which animal is an example of a service animal trained to execute specialized tasks?
Where are working animals usually raised?
Where are working animals usually raised?
What is one of the uses of the strength of horses, elephants, and oxen mentioned in the text?
What is one of the uses of the strength of horses, elephants, and oxen mentioned in the text?
For what purpose do police forces use dogs?
For what purpose do police forces use dogs?
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Study Notes
Animal Phylogeny
- Bilateria is the clade that includes animals with a bilaterally symmetric body plan.
Animal Diversity
- The estimated number of living animal species as of 2022 is approximately 9.5 million.
Cambrian Explosion
- The Cambrian explosion, a period of rapid diversification of animal life, began around 541 million years ago.
Animal Size
- The text mentions animals ranging in length from microscopic to over 30 meters.
Zoology
- The scientific study of animals is known as zoology.
Working Animals
- Working animals are primarily used for tasks that benefit humans.
Service Animals
- A dog trained to assist someone with a disability is an example of a service animal.
Raising Working Animals
- Working animals are typically raised in farms or specialized facilities.
Strength of Animals
- The strength of horses, elephants, and oxen is used for tasks like transportation, farming, and construction.
Police Dogs
- Police forces use dogs for detection, apprehension, and protection purposes.
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