Which of these is not an example of mechanical weathering?
a. waves crashing on a seashore
b. a glacier moving down a mountainside
c. a river flowing from a mountain into a valley
d. a cave forming when limestone rock is exposed to acid

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation

What do all of the above organisms have in common