Development of tadpole to frog.
CBSE CLASS VIII
SCIENCE
Answers
Answer:
Explanation:
Frogspawn, week 1: laid in February, two to three weeks hatching time.
Hatchling tadpole, week 3: the first week after hatching the tadpole might not be visible as it doesn't have the energy to swim. It'll camouflage itself while it eats the jelly in its stomach.
Swimming tadpole, week 4: after a week the tadpoles will have strength to swim and will be looking for food. They'll only be eating algae.
Toothed tadpole, week 6: at about four weeks old tadpoles grow teeth and more complex digestive system develops. Their diet expands to include small insects.
Tadpole with legs and tail, week 7: at about five weeks old the tadpole will gradually start to grow legs, starting with the back legs.
Froglet, week 14: 12 weeks after hatching the tadpole now looks like a tiny frog with a tadpole's tail. The lungs should have also developed by this point and the froglet can start venturing out of water.
Young adult frog, 16: at around 14 weeks old the tadpole's tail drops off. The metamorphosis is complete and the tadpole has become a young frog.
Answer:
After another few weeks the tadpole develops front legs and the head shape of a frog. The final change occurs as the tail becomes reabsorbed by the tadpole and utilised as a source of protein. This is when the tadpole ceases to be a tadpole and becomes a tiny frog, often referred to as a froglet.