Question

I have a Question

Answer 1

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of eight mutations?

1.5 million years
10 million years
40 million years
20 million years
Question 2 (Multiple Choice Worth 2 points)



What makes mitochondrial DNA useful as a molecular clock?

It is only found in select organisms, making it easier to compare relationships between species that have it.
A large portion of the DNA ring is not vital to structure or function, allowing it to accumulate neutral mutations.
Its rate of mutation increases over time as organisms continue to evolve and differentiate from each other.
A slow mutation rate makes it useful for determining evolutionary relationships between ancient species.

Answer 2

Need help Fast please

Answer 3

The first is 40 million years

Answer 4

The 2nd one is either the first or last choice but I'm not entirely sure which