Witch is a key element found in all carbohydrates lipids proteins and nucleic acids
a ammonia
b carbon
c nition
d legumes

The valve seat performs two functions: it provides a seal for the valve in the combustion chamber, and it provides a cool surface to carry heat away from the valve. most valves use a seating angle.

2with a manual transmission, the speed of thevehicle determines

Pleas give me brief explanation about deterministic model in advanced hydrology