<span>1. constraints imposed by the molecular structure of DNA and RNA on the formation of hydrogen bonds among the four purine and pyrimidine bases such that adeninepairs with thymine or uracil, and guanine pairs with cytosine.</span>
The impact of the material
type with which the slope is made affects the acceleration. Acceleration will
be higher and smoother if the material of the slope surface is smoother as
opposed to a texture which is not smooth. Smoother surface allows more acceleration
because it will have less friction and resistance. Otherwise the friction will
slow the object down for example a grassy ground will have more friction than a
well maintained marble floor.
Im pretty sure its b hijacking planes
<span>A compound machine is a combination of two or more "Machines"
Hope this helps!</span><span />