Ray Finned Fish & Chondrichthyes Quiz

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Questions and Answers

Give examples of organisms in the class Agnatha.

Lampreys and hagfish.

Give examples of organisms that are jawless.

Lampreys and hagfish.

Give examples of organisms in the Chondrichthyes class.

Sharks, skates, and rays.

List several characteristics of the class Chondrichthyes.

Jawed fish, lack swim bladder, cartilaginous skeleton. Signup and view all the answers

List the common characteristics of the phylum chordate.

Notochord, nerve chord, pharyngeal slits, postanal tail. Signup and view all the answers

List the common characteristics of bony fish.

Swim bladder, bony scales, maintains neutral buoyancy, external reproduction. Signup and view all the answers

What does fusiform mean in terms of body shape?

Normal. Signup and view all the answers

What does depressiform mean in terms of body shape?

Flattened. Signup and view all the answers

What does globular mean in terms of body shape?

Round. Signup and view all the answers

Describe the superior mouth position.

Top feeder. Signup and view all the answers

Describe the terminal mouth position.

Predatorial. Signup and view all the answers

Describe the inferior mouth position.

Bottom feeder. Signup and view all the answers

Describe ganoid scales.

Thick and heavy. Signup and view all the answers

Describe ctenoid scales.

Lighter and more flexible. Signup and view all the answers

Describe cycloid scales.

Lighter and more flexible. Signup and view all the answers

What does dioecious mean?

Separate sexes. Signup and view all the answers

What is the difference between synchronous fish and sequential fish?

Synchronous fish possess functional gonads of both sexes at the same time; sequential fish change from one sex to another. Signup and view all the answers

How do fish maintain the proper amount of solutes in the body?

Osmoregulation. Signup and view all the answers

The most common form of reproduction in fish is called?

Oviparity. Signup and view all the answers

Give examples of fish that are hermaphroditic.

Wrasses, parrot fish, sea basses (protogyny); anemonefish (protandry). Signup and view all the answers

What type of scales do sharks and rays have?

Denticles. Signup and view all the answers

What do sharks store to help control their water loss?

Urea. Signup and view all the answers

How do sharks sense the prey in their surroundings?

Lateral lines and sensory pores. Signup and view all the answers

What is the main form of reproduction for sharks?

Ovoviviparous. Signup and view all the answers

What is the main form of reproduction in a Dogfish shark?

Ovoviviparous. Signup and view all the answers

What are 4 characteristics sharks/rays use for energy efficiency?

Scales that point backward, maintain a balance with saltwater, store urea, teeth. Signup and view all the answers

List three ways sharks are different from bony fish.

Sharks lack a swim bladder; have a cartilaginous skeleton; control water with urea. Signup and view all the answers

What is the function of the liver in a shark?

Provides buoyancy by reducing overall density. Signup and view all the answers

What is the function of the spiral valve in a shark?

Increases surface area for nutrient absorption. Signup and view all the answers

Study Notes

Class Agnatha

Includes jawless organisms: lampreys and hagfish.

Class Chondrichthyes

Comprises jawed fish: sharks, skates, and rays.
Characteristics: lack swim bladder, possess a cartilaginous skeleton.

Phylum Chordata

Key features:
- Notochord develops into the vertebral column.
- Nerve chord forms the brain and spinal cord before birth.
- Pharyngeal slits present.
- Postanal tail exists.

Bony Fish Characteristics

Possess a swim bladder for buoyancy.
Have bony scales covering their bodies.
Maintain neutral buoyancy naturally.
Reproduction primarily external and sexual.

Body Shapes of Fish

Fusiform: typical streamlined shape.
Depressiform: flattened structure.
Globular: round morphology.

Mouth Position Types

Superior: used for top feeding (e.g., surface feeders).
Terminal: suited for predatory behavior (e.g., hunting).
Inferior: designed for bottom feeding (e.g., scavenging).

Types of Fish Scales

Ganoid: thick and heavy scales.
Ctenoid: lighter, provides flexibility.
Cycloid: similar to ctenoid, light and flexible.

Reproductive Terms

Dioecious: refers to separate sexes in a species.
Synchronous fish: functional gonads of both sexes present simultaneously.
Sequential fish: ability to change sex over time (e.g., snook).

Osmoregulation

Mechanism fish use to maintain solute balance in their bodies.

Reproductive Forms

Oviparity: common reproductive method involving external fertilization (eggs and sperm).
Hermaphroditic examples:
- Protogyny: female to male transition (e.g., wrasses).
- Protandry: male to female transition (e.g., anemonefish).

Scales of Sharks and Rays

Denticles: small, backward-pointing scales providing texture.

Water Control in Sharks

Sharks store urea to help manage water loss in saline environments.

Prey Detection

Sharks have lateral lines and sensory pores to sense prey in their surroundings.

Reproductive Strategy in Sharks

Ovoviviparous: eggs hatch internally, leading to live births.

Dogfish Shark Reproduction

Follows ovoviviparous method with yolk sac nourishment during gestation, leading to live births.

Energy Efficiency in Sharks/Rays

Use of backward-pointing scales to trap water, minimizing friction.
Maintaining saltwater balance as elasmobranchs.
Storing urea and other chemicals for buoyancy.
Efficient dental structure aids predation.

Key Differences: Sharks vs. Bony Fish

Sharks lack swim bladders; bony fish possess oily swim bladders.
Sharks have cartilaginous skeletons; bony fish have bony skeletons.
Sharks control water levels using urea; bony fish use different mechanisms.

Shark Organ Functions

Liver: contains oil, aiding buoyancy by reducing body density.
Spiral valve: increases intestinal surface area for enhanced nutrient absorption.

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Description

Test your knowledge about Ray Finned Fish and Chondrichthyes with this quiz. Learn about jawless organisms, examples of each class, and their key characteristics. Perfect for students studying marine biology or ichthyology.