Answer:
false
Explanation:
not everyone has radial symmetry
With shorter necks, giraffe ancestors could not reach food-containing branches on tall trees. This resulted in the directional selection of giraffes with longer necks.
<h3>
Why is choosing a direction necessary? </h3>
It nearly appears obvious that the giraffe's long neck developed as a result of a lack of food in the lower branches of trees. The giraffe has a significant advantage because it is taller than any other mammal and can feed where few others can.
When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.
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The diastolic pressure refers the two values are recorded during the measurement of blood pressure.It is the number or the bottom number indicates the pressure in the arteries when the heart rests between beats.
Less then 80 are the normal diastolic blood pressure. Prehypertension which is indicaated by the blood pressure between 80 to 90. The first, systolic pressure, which represents the peak arterial pressure during systole. The second, that represent minimum arterial pressure during diastole.
the force the heart exerts on the walls of the arteries in between beats can be easily measured by the diastolic blood pressure .Diastolic blood pressure is mainly determined by the total arterial peripheral resistance which majorly influence Arterial elastance and compliance.
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