The main difference between a prokaryotic and a eukaryotic cell is the absence of nucleus in the prokaryotic cell and its presence in the eukaryotic cell. The genetic material of the prokaryotic cell is not inside the membrane. On the contrary, the eukaryotic cell has genetic material inside the nucleus. Also, eukaryotes have linear chromosomes while prokaryotes have circular chromosomes.
Answer:
b) from a region of high pressure to a region of low pressure
Explanation:
Blood flow is measured in blood volume per unit time. It is the movement of blood through an organ, tissue or vessel. It is initiated when ventricles in heart contract leading to its ejection at high pressure. Major arteries receive this blood and they further transport it at high pressure to smaller arteries, arterioles and capillaries. Hence arteries have thick walls to withstand this pressure. The pressure decreases when blood reaches to veins hence their walls are not that thick. Hence, blood flows from a region of high pressure to a region of low pressure.
Deafness.
EXPLANATION
In cats, inherited congenital deafness is seen almost exclusively in white coated individuals. The deafness is caused by degeneration of the auditory apparatus of the inner ear and may affect one or both ears.
The gene responsible is an autosomal dominant gene termed W (for White). This gene appears to be pleiotropic – ie, it has more than one effect, being responsible for the white coat colour and also blue eyes and deafness.