According to the cladogram, scientists use fossil evidence to anatomically bridge the gap between what two organisms?
a) fish and mammal
b) fish and amphibian
c) amphibian and mammal
d) amphibian and reptile

What statements describe a host organism?

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?