Answer: option c - in the coding region of the Pitx1 gene
Explanation:
Note that there is LACK OF SPINE, not the presence of defective spine; so, an heritable mutation must have occurred in the coding region of pix1 gene of freshwater sticklebacks resulting in absolute LACK OF SPINE
Answer:
Viruses do not need a host cell to reproduce but will use one if available to save energy
It is a cold Artic air mass over Siberia. Air masses are altered because it doesn't stay in one place and changes as it moves due to the temperature of environment that can be caused by moisture. The cold Artic Mass from Siberia will go to the North Pole, Canada then moves further to the South area.
I'm almost certain that the answer would be X and Y
Hoped this helped!
