Entry Test MCQ :: Transport

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31.

Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called

A.	Transpiration pull	B.	Root pressure
C.	Ascent of sap.	D.	All of these

32.

Pressure flow theory was proposed by

A.	H-Van Mohl	B.	Dixon
C.	Vander wall.	D.	Earnst Munch

33.

A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called

A.	Transpiration pull	B.	Root pressure
C.	Osmotic pressure.	D.	None of these

34.

Addition of salts and other solutes from other cells into xylem sap, _____ the water potential of the xylem sap

A.	Increases.	B.	Lowers.
C.	Doesn't effect.	D.	Maintains.

35.

Open circulatory system can contain

A.	Red Blood Cells	B.	White Blood Cells
C.	Haemoglobin	D.	All of these

36.

Which of the following is true about hearts of earthworm?

A.	There are 5-7 pairs of heart.	B.	They are present between 1-7th segments.
C.	They are present lateral to the oesophagus.	D.	They pump blood from ventral to dorsal vessel.

37.

Single circuit heart is found in

A.	Fishes	B.	Amphibians
C.	Reptiles	D.	Mammals

38.

It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood.

A.	35%	B.	45%
C.	55%	D.	75%

39.

95% of the cytoplasm ofred blood cells is the

A.	Antibodies	B.	Haemoglobin
C.	Enzymes	D.	Proteins

40.

_______ give rise to macrophages, which destroy larger particles by phagocytosis.

A.	Nautrophils	B.	Basophila
C.	Monocyte	D.	Lymphocyte