Visible characteristics of snake

The jaws of snakes are loosely jointed and extremely flexible. There are no ears or movable eyelids; the eyes are covered by transparent spectacles, or ocular scales.

Explanation:

Snakes have good vision.There are no ears or movable eyelids; the eyes are covered by transparent spectacles, or ocular scales.

The correct answer is the one that shows a bone having the most porous appearance inside.

Osteoporosis is a disease of the different types of bone tissue that make up bone ("cortical bone" and "trabecular bone").

It is a disease that is related to a decrease in the amount of bone tissue in the bones and / or an alteration of its structure: thinning of the cortex and bone trabeculae that become porous.

The cause is an imbalance between the deficit activity of osteoblasts and normal osteoclastic bone resorption.