The gill raker of fishes take part in?
feeding
respiration
swimming
diffusion
Correct answer is A
In fish with carnivorous feeding habits, the gill rakers are long, hard, and pointed, constituting an adaptation to protect the gills, prevent the escape of the prey, and assist in swallowing.
The respiratory organ in the land snail is the
radula
mantle
tentacle
foot
Correct answer is B
The mantle is also known by the Latin word: pallium (adj. pallial). Snails originally breathe by gills situated in the pallial cavity.
The function of maxillipeds in crayfish is to aid
walking
swimming
feeding
respiration
Correct answer is C
No explanation has been provided for this answer.
In the earthworm, the cocoon is secreted by the
chaeta
prostomium
peristomium
citellum
Correct answer is D
No explanation has been provided for this answer.
One of the features which adapts Paramecium to its environment is the possession of
a regular shape
two nuclei
cilia
a pellicle
Correct answer is C
No explanation has been provided for this answer.