MCQ
Diffusion membrane is made up of
- AThin squamous epithelium of alveoli
- BEndothelium of alveolar capillaries
- CBasement substance in between the two mentioned above
- ✓All of the above
$(i)$ Thin sequamous epithelium of alveoli. $(ii)$ Endothelium of alveolar capillaries. $(iii)$ Basement substance in between the squamous in epithelium of alveoli and endothelium of alveolar capillaries
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| $(a)$ Gliding joint | $(i)$ Between carpal and metacarpal of thumb |
| $(b)$ Hinge joint | $(ii)$ Between Atlas and Axis |
| $(c)$ Pivot joint | $(iii)$ Between the carpals |
| $(d)$ Saddle joint | $(iv)$ Between Humerus and Ulna. |
Select the correct option from the following
$R$ : It allowed the animal to have an alimentary canal longer than the body & space for storing gametes.