#1
What is the function of the swim bladder in fish?
To regulate buoyancy
ExplanationRegulates fish buoyancy by controlling air volume.
#2
Which part of the fish is responsible for removing waste from the blood?
Kidneys
ExplanationFilters waste and excess ions from blood.
#3
What is the purpose of the mucus layer on the skin of fish?
To reduce friction in water
ExplanationLubricates skin for streamlined swimming.
#4
What is the primary function of the gills in fish?
To exchange gases
ExplanationFacilitates oxygen intake and carbon dioxide release.
#5
Which type of fin helps fish to maintain balance and stability?
Dorsal fin
ExplanationProvides stability and steering control.
#6
What is the purpose of the lateral line system in fish?
To detect vibrations and movements in the water
ExplanationSenses pressure changes for detecting movement.
#7
Which type of fish reproduction involves the release of eggs and sperm into the water?
External fertilization
ExplanationFertilization occurs outside the fish's body.
#8
Which type of fish scales are characterized by their small, overlapping, and smooth appearance?
Cycloid scales
ExplanationSmooth scales with concentric growth rings.
#9
Which organ in fish is responsible for detecting changes in water pressure?
Lateral line system
ExplanationDetects pressure changes for orientation.
#10
What is the function of the pyloric caeca in fish?
To aid in digestion
ExplanationAssists in digestion and nutrient absorption.
#11
What is the purpose of the operculum in fish?
To protect the gills
ExplanationShields and regulates water flow over gills.
#12
Which part of the fish's brain is responsible for processing olfactory information?
Olfactory bulb
ExplanationProcesses smell signals for identification.
#13
What is the purpose of the ampullae of Lorenzini in sharks?
To detect electrical signals
ExplanationSenses weak electric fields in water.
#14
What is the function of the Weberian apparatus in some fish?
To improve hearing
ExplanationEnhances detection of sound vibrations.
#15
Which hormone is responsible for controlling the fish's metabolism?
Thyroxine
ExplanationRegulates metabolic rate and growth.