Answer:
structural
Explanation:
In addition to flight and body feathers, birds also have down feathers. Down feathers are soft and fluffy because they don't have barbules and barbicels (the structures that hook feather barbs together). Down feathers help to keep a bird warm by trapping air close to the body, which insulates the bird from the cold.
My suggestion is to take plenty of notes and write definitions
A structural unit of a eukaryotic chromosome, consisting of a length of DNA coiled around a core of histones.
Answer:
The mean weight of the parents is 2.0 lb.
Explanation:
I have attached the picture showing step by step solution for better visuals and understanding.
Answer:
d. The dermis is usually thicker than the epidermis