

Zoology - Fishes
Flashcard
•
Biology
•
12th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What type of scales do sharks possess?
Back
Sharks have placoid scales, which are small, tooth-like structures that provide protection and reduce drag in the water.
2.
FLASHCARD QUESTION
Front
What is the function of the counter-current system in fish gills?
Back
The counter-current system in fish gills ensures that the concentration gradient of oxygen is maintained, allowing for efficient gas exchange.
3.
FLASHCARD QUESTION
Front
Which group of fish is known as bony fish?
Back
The group of bony fish is called Osteichthyes, characterized by a skeleton made of bone.
4.
FLASHCARD QUESTION
Front
What organ do sharks use to maintain buoyancy?
Back
Sharks use a large, oil-producing liver to increase buoyancy.
5.
FLASHCARD QUESTION
Front
What is the role of spiracles in the respiratory system of insects?
Back
Spiracles allow air to enter the insect's body for respiration.
6.
FLASHCARD QUESTION
Front
What are the main differences between Chondrichthyes and Osteichthyes?
Back
Chondrichthyes are cartilaginous fish (like sharks and rays), while Osteichthyes are bony fish with a skeleton made of bone.
7.
FLASHCARD QUESTION
Front
How do fish regulate their buoyancy?
Back
Fish regulate buoyancy primarily through swim bladders (in bony fish) or oil-filled livers (in sharks).
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