Question

The phenomena of spawning and amplexus occur in___________
A) Rana hexadactyla
B) Pavo cristatus
C) Felis domestica
D) Naja naja

Answer 1

Amplexus: It is a form of mating action in which, as part of the mating process, a male grasps a female with his front legs and, at the same time or with some time delay, fertilizes the eggs as they are released from the body of the female.
Spawning: Spawning refers to the egg and sperm release process, and the act of both sexes is called spawning. Most marine species reproduce by the process of spawning, except for aquatic mammals and reptiles.

Complete answer:
Rana hexadactyla emerge from aestivation with the start of the rainy season and continue to breed immediately, which lasts from July to September. In ideal shallow waters, males assemble and begin to croak to lure females for mating or copulation. The male is mounted on the female's back and tightly grasps his forelegs around her thorax. During the breeding season, the roughened nuptial pads on the bases of internal· male fingers are fully grown and help him retain the slippery female. This sexual embrace, called amplexus, may continue for several days before several hundred ovas or eggs are deposited into the water by the female via her cloaca. Spawning is the name of this method of releasing the eggs.

Hence, option A) is the correct answer.

Note:
Anura, which includes frogs and toads, is the highest order, with more than 3,900 species. Anura is placed in the order of Rana hexadactyla. Frogs exist in pools with fresh water, in lakes and in humid areas. Tiny animals such as spiders, worms, small fishes, slugs, snails, etc. feed on them. A frog is completely aquatic throughout its early life and breathes like a fish with gills. It is poikilothermic, i.e. their body temperature changes with the atmospheric temperature that varies.