Why is there a much larger number of grass than snakes or hawks?

Classify the structures as homologous or analogous, depending on their structure and function.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons