BIO short question (Mammals Transport)

1. Why unicellular organisms like Amoeba do not develop a vascular system?

2.Why a double circulation is needed instead of a single powerful one?

3.State adaptation of heart muscle so they can contract as a whole

4.How a smooth upward squeeze  is done by coordination of heart muscles?

5.What are the expected results in heart rate of increased blood pressure in ( 1 )aorta   (2) vena cava ?

6.How is smooth continued blood flow in between heart beats ensured?

7.What does serum equal to?

8.Why do blood velocity drop when they reach capillaries?

9.Why malnutrition causes odema?

10.After vigorous exercise, why people having a pale face are more likely to fall than those having a red face?

BIO short question (Transport in Angiosperms)

1.Are all three pathways include osmosis?

2.Do all water enter xylem entered a cell membrane?

3.How is a pushing force in xylem generated?

4.Transpiration involved two steps. Which are they?

5.Try to explain how day light change the shape of a stomata.