What was the 1st life on Earth called A jawless fish
B stromatolite
C tiktallik
D meganeura

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Explain how organisms could be harmed by high levels of salt from roadways?

Nucleic acids offer variability because they contain alternate forms of genes called .