Question

Find the incorrect statement w.r.t. respiratory organs.

• A. Mechanism of breathing vary among different groups of animals depending mainly on their habitats and level of organisation
• B. Lower invertebrates like sponges, coelenterates, flatworms etc., exchange $O_2$ with $C{O}_2$ by simple diffusion over the entire body surface
• C. Earthworms use moist cuticle and insects have a network of gills to transport atmospheric air within the body
• D. Reptiles, birds and mammals respire through lungs

Answer 1

The correct option is A Mechanism of breathing vary among different groups of animals depending mainly on their habitats and level of organisation

• When you breathe in, or inhale, your diaphragm contract and move downward. This increases the space in the chest cavity into which lungs expand.
  
• The intercostal muscles between ribs also help enlarge the chest cavity.

So, the correct option is 'Mechanism of breathing vary among different group of animals depending mainly on their habitats and level of organisation'.