Respiratory surface must be moist so gasses can diffuse across cell membranes
cells lining respiratory surface are thin to optimize gas fusion
respiratory surface are must be large to allow for adequate gas exchange
Answer:
Option B, Biology requires that humans eat a certain amount each day, but culture teaches us what we want to eat, when we want it, and how to eat it.
Explanation:
As per biology, all living individuals require energy for doing their day to day activities and also to survive. This energy is obtained through food. Food provides essential nutrients and minerals and energy to the body that helps the body to survive, grow and develop.
Now a culture defines what to eat and how to eat for instance in some culture only vegetarian food is allowed and in some both vegetarian and non-vegetarian food is allowed for consumption.
Also the timing of eating are defined by the preachers of the culture.
Hence, option B is correct
Phospholipids and proteins
