external morphology of a frog
Answers
Explanation:
Morphology of Frogs
An adult frog has a stout body which is differentiated into head and trunk. Other external features are a pair of nostrils, protruding eyes, a membranous tympanum (ear), slippery/warty moist skin and webbed limbs. ... Frogs are unisexual i.e., they show sexual dimorphism.
Answer:
The frog is very well adapted both for jumping and leaping on the land and swimming or floating in water. Normally frog can jump up to three feet. When a frog jumps to a shorter distance, it is known as leaping. The alternate kicks of the hind-limbs push the webbed toes against water, thereby providing the force for swimming. The boat-shaped body of the frog, mainly due to the absence of neck, is helpful in swimming.
The adult frog is carnivorous and mostly feeds on insects and their larvae, spiders, earthworms and in some cases evens their own larvae. It will capture only a moving prey and swallow it as a whole.
When the prey is within a catching distance, the free posterior end of the tongue is shot out suddenly with much speed and is taken back into the buccal cavity with the prey sticking to it. The tadpole (larva) of frog is herbivorous.
During the rainy season, which is also the breeding season of the frog, the frogs make peculiar sounds with the help of their vocal cords, known as croaking. The male frogs croak louder than the females, because in them the pitch of croaking is increased due to the presence of two vocal sacs situated one on each side of the floor of the throat. The vocal sacs act as resonators. The croaking is a mating call to attract the females.
