Question

According to Evolution, would you expect more or less species on Earth over time? Explain. (I know it's increase, but i don't know how to explain it)

2. Describe how the following provide evidence for evolution (or show relatedness):
Embryological data:
Molecular data:
Structural data:

Answer 1

Have you heard of the idea of adaptive radiation? Perhaps that can lend you insight into your query.

One could examine adaptive radiation through an analogy. Let's say there are five plumber jobs open (this community has faulty plumbing), and all five positions are filled - it is very competitive between these five! But, an opening appears for a doctor and a pharmacist (because it's flu season), so one of the plumbers becomes a doctor and one becomes a pharmacist.

Adaptive radiation is sort of similar. Instead of job openings, you have ecological "niches" - sort of like the biological equivalent of a job, a role in the community. When there are niches available / new ones are created, organisms tend to "radiate" into them - and in time, these organisms, though initially from one species, presumably undergo speciation.

Is that a fair analogy, @blues ? :)

Answer 2

Never learned "Adaptive Radiation