I would say D because mechanical weathering is the breaking up of rocks by physical forces
Answer:
Replacing skin defects has witnessed several developments over the centuries. It started with the introduction of skin grafting by Reverdin in 1871. Since then, varieties of skin grafting techniques have been used successfully. Despite being clinically useful, skin grafts have many limitations including the availability of the donor site especially in circumstances of extensive skin loss, immune rejection in allogenic skin grafts, pain, scarring, slow healing and infection.1,2 For these reasons, scientist have worked hard to find skin substitutes to replace skin defects without the need for a "natural" skin graft. These materials which are used to cover skin defects are called "Skin substitutes". This article briefly discusses the common types of skin substitutes and their clinical uses.
Answer:
(y+9)(y-3)
Explanation:
9*(-3) = -27
9+(-3) = 6
Answer:
the heat in the classroom made him feel faint so he asked permission to exit
Copper is a good medium for the conduction of heat and electricity
These fires create convection funnels, and throw a lot of particles into the upper atmosphere
The sun, a lamp, or an electric heater all warm us by radiation
Explanation:
hope this helps
