LIFE CYCLE OF FROG
The life cycle of a frog is very interesting. A frog changes its body shape as it grows. This big change is called metamorphosis.
A frog begins its life as an egg. Female frogs lay many tiny eggs in water. These eggs stick together in a jelly-like group called frogspawn. The eggs float on ponds, lakes, or slow-moving water.
After a few days, the eggs hatch into tadpoles. Tadpoles look like small fish. They have long tails and no legs. They live only in water and breathe through gills. Tadpoles eat tiny plants and algae.
As tadpoles grow, they start to change. First, they grow back legs. Then front legs appear. Lungs begin to develop so they can breathe air. Slowly, their tail becomes shorter. At this stage, they are called froglets.
Finally, the tail disappears completely, and the froglet becomes an adult frog. Adult frogs can live on land and in water. They breathe with lungs and also through their moist skin. They eat insects and small animals.
This amazing journey from egg to adult frog shows how nature helps animals grow and change.
STAGES OF DEVELOPMENT OF CHICKS
The development of a chick is a fascinating biological process that takes place inside an egg over about 21 days. It begins when a fertilized egg is kept warm under the mother hen or in an incubator. Warmth is essential for the embryo to grow properly.
On Day 1, the tiny embryo starts forming. By Day 3, the heart begins to beat, and basic body structures start developing. Around Day 7, important organs such as the eyes, wings, and beak become visible. The embryo continues to grow rapidly, using the yolk inside the egg as its main source of nutrition.
By Day 14, feathers start forming, and the chick’s body becomes more defined. The chick now occupies most of the space inside the egg. During the final days, it positions itself near the air sac inside the shell to prepare for hatching.
Around Day 21, the chick uses a special temporary structure called an “egg tooth” to break the shell. This process is called hatching. Once free from the shell, the chick dries off, becomes fluffy, and is ready to begin its life outside the egg.
Post a Comment
Post a Comment