The dermis:
a. contains no blood vessels.
b. functions as a padding and insulation.
c. is divided into three distinct layers
d. is responsible for most of the skin's structural strenght.
e. is made of epithelial tissue.

D. is responsible for most of the skin's structural strength.

Explanation:

A. contains no blood vessels.

False. The dermis contains blood vessels together embedded in it along with the sweat and sebaceous or oil glands, hair follicles, and nerve endings.

B. functions as a padding and insulation.

False. The fat layer that is located below the dermis is the one responsible for padding and insulation.

C. is divided into three distinct layers

False. The dermis is divided into only two separate layers. These are the papillary layer or the upper layer and the reticular layer or the lower layer.

D. is responsible for most of the skin's structural strength.

Yes, the dermis functions for providing the skin's structural strength because of it's thick fibrous and elastic tissue layer. This layer consists primarily of collagen and elastin that also allows for the skin's flexibility.

E. is made of epithelial tissue.

False. The dermis is made up of fibrous and elastic tissue. It is the epidermis which is composed of the epithelial tissue.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.