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Which species of frog holds the title for being the world’s largest, growing up to 15 inches in length and weighing up to 7 pounds?

Cuban tree toad
Goliath frog
Golden poison frog
Wood frog

The world’s largest frog is the goliath frog of West Africa—it can grow to 15 inches and weigh up to 7 pounds.

Vocal cords
Skin
Eyes
Tongue

Frogs were the first land animals with vocal cords. Male frogs have vocal sacs—pouches of skin that fill with air. These balloons resonate sounds like a megaphone, and some frog sounds can be heard from a mile away.

Brachycephalus didactylus
Poison Dart frog
Paedophryne amauensis
Glass frog

At 7mm (0.27 inches) long, Paedophryne amauensis, endemic to eastern Papua New Guinea is not only the smallest frog but also may be the world’s smallest vertebrate.

To blend in with their environment
To camouflage from predators
To attract prey
To warn predators of their toxic skin

Many poisonous frogs, such as the golden poison frog and dyeing poison frog, are boldly coloured to warn predators of their dangerous toxic skins.

Hibernation
Heat production
Production of glucose antifreeze in the blood
Brumation

The wood frog can live north of the Arctic Circle, surviving for weeks with 65% of its body frozen. This frog uses glucose in its blood as a kind of antifreeze that concentrates in its vital organs, protecting them from damage while the rest of the body freezes solid.

The Hindu Science Quiz: On Frogs – Artifex.News

Sci-Five | The Hindu Science Quiz: On Frogs