Coming up with the theory of evolution
Here, you have a case of codominance.
You know that because they tell you that in the presence of both alleles (purple and white) you have a light violet. No one is dominant over the other, both appear as a combination of alleles.
Purple: P
White W
A heterozygous plant has PW alleles.
PW x PW = PP PW WP WW
25% chances of PP (deep purple)
50% chances of PW (ligth violet)
25% chances of WW (white)
Answer: positive sodium ions
Explanation:
This relates to the Action Potential which is what a nerve cell goes through when it needs to send information down the nerve cell to another cell and so on till it gets to the destination of the message.
The information is transmitted when the segments of the axon fire and when they do, positive sodium ions come in from outside the cell to the inside thereby making the inside positive. The previous segment would return to a resting potential when potassium ions which are negative, rush into the cell.
