Question

True or false.
1)During collision total momentum remains constant-
2) ‘Pteriodophytes’ is called the ‘amphibian’ of the plant kingdom:-​

Answer 1

Answer:

1. true,During collision momentum of the system remains constant. When two bodies collide with each other as shown, action and reaction force comes into action i.e. two bodies exerts force on each other.
2. false, In case of pteridophytes, they disperse spores and require water for reproduction. But they are vascular with definite xylem and phloem so they are not the true amphibians of the plant kingdom rather they are known as vascular amphibians. So, pteridophytes are not amphibians.