What is one disadvantage of fossil fuels?
A. They are widely available.
B. They are relatively expensive.
C. They are easy to use and transport.
D. They can cause significant pollution.

The instructions for the genetic traits of an organism are directly determined by the a-numbers of a,t,c and g units in a sugar molecule b-sequence of the bases in dna molecules c-length of a dna molecules d-way the bases are paired in the two strands of a dna molecule

Which of the following is an effect of the uneven heating of the earth by the sun? a sea breeze a land breeze a convection current all of the above

One of the reasons that stars are so large is because