Question

Explain the life cycle of a frog

Answer 1

The life cycle of a frog begins with a fertilized egg. The fertilized egg develops into a tadpole. The fertilized egg and tadpole stages are found in the water in the spring. The tadpole develops into an immature frog.As the immature frog develops it is transformed via the process of metamorphosis into an adult frog. The tail is absorbed and the external gills are replaced by lungs. The adult frog lives on land and in the water and breathes air.

Answer 2

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LIFE CYCLE OF A FROG:-

The process in which a tadpole turns into a frog is called metamorphosis, and it is an amazing transformation. Here we have broken metamorphosis down so you can see the stages a tadpole goes through as it develops into an adult.  

Eggs:-

Each of those black dots is made up of a bunch of cells that will eventually grow into a tadpole. Depending on the species, these egg masses can be made up of several hundred eggs.

Tadpoles:-

Within a few days, the eggs develop into tadpoles. Tadpoles live completely underwater. After a few weeks, a hormone in the tadpole’s thyroid gland initiates metamorphosis.

Tadpole with hind legs:-

Over about a 24 hour period, the tadpole develops into a frog. This means almost every organ has to change so the tadpole can go from living underwater to living on lt frog. In this picture you can see the tadpole has started to grow hind legs.

Tadpole with hind and and front legs:-

After the hind legs have started to form, a pair of front legs will begin to develop and the tail will start to disappear. You might also notice that the tadpole has started to form a frog-like face. The tadpole’s skull is made out of cartilage (the same stuff your nose and ears are made out of) but during metamorphosis, the cartilage is replaced with bone.

Froglet (or young frog):-

When the tadpole reaches the froglet stage, it is almost a full adult. At this point, the tadpole’s gills have disappeared, and its lungs have enlarged. This means it is ready to leave the water and live on land. Once its tail disappears, it will become an adult frog.

Adult:-

This is a fully grown frog. As you have just read, frogs go through a lot to get to this phase. They even go through changes that aren’t visible in these pictures. The tadpole’s horny teeth, once used to tear up plants, disappear and tongue muscles develop to catch insects. The tadpole’s large intestine, important for digesting algae and plants, shrinks to suit the frog’s meat-eating diet.

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