Question

Please give valid answer...

Give reason of the following questions...

1) Although both food and oxygen are necessary for life, man can live without food for number of days but he dies without oxygen within few minutes.

2) Frogs possess web in hind legs.

3) Snakes lack limbs.

4) Porifers have perforated bodywall.

5) Lizards have clawed pentadactyle limbs.

Answer 1

1. A human can live without food for a few days due to the storage of fat in his body while he cannot live without oxygen as if there is no supply of oxygen for at least 5 minutes the brain of human gets damaged resulting in his death.
2. shop possesses web in Hind Limbs as it helps them to swim jump and do many other activities.
3. It’s all because of something called the Sonic hedgehog gene.
4.wipes are described by the ownership of a sustaining framework one one of a kind creatures
little and tube formed water enters the wipe through demal pores and streams into the chambers
poriferans dont have mouths rather they have pores on their body to draw water