Answer:
Lipids and proteins
Explanation:
It gets lipids from the membrane of the host cell it attaches to.
The proteins on the envelope are from the original virus itself.
Bones are made up of Calcium Phosphate given by the chemical formula, 
. When bones are kept in Hydrochloric acid, given by the chemical formula, HCl, they become soft because the calcium compound present in the bones changes its form. The following double displacement reaction takes place when the bones are kept in HCl,
---> 
Calcium chloride is water soluble, and gets washed away. This makes the bone thin and soft.
C planting more vegatation
Crossing over? That involves the random exchange of chromosomes.
Answer:
Cold climates favor mechanical weathering.
Explanation:
A cold, dry climate will produce the lowest rate of weathering. A warm, wet climate will produce the highest rate of weathering. The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering
