Ascientist identifies a pre-mrna with the following structure.
what is the predicted size of the corresponding mature mrna in base pairs (bp), excluding the 5’ cap and 3’ poly-a tail?
220bp
295bp
140bp
435bp

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

synapse nervous system