The cells that are full of water and rigid are called ________.
support cells
flaccid
turgid
none of the above
Blood is composed of ___________.
plasma and red blood cells
plasma and formed elements
red and white blood cells
red blood cells, white blood cells and platelets
Thick muscular walls are present in ___________.
arteries
arterioles
veins
venules
The roots absorb water through _______________.
epidermal hairs
root hairs
root xylem
root phloem
The liquid portion of the blood is called _______
water
plasma
serum
sap
Pulse beat is measured in _____________
nerve
artery
vein
heart
Stomata open and close due to _____________.
presence of valves
hormonal control
turgor pressure of guard cells
concentration gradient of the gases
The normal blood pressure in man is ___________
80/120 mm Hg
120/80 mm Hg
120/100 mm Hg
100/80 mm Hg
Stomata are present on the __________ of the leaves.
upper surface only
lower surface only
mostly upper surface
mostly lower surface
The double membraned structure surrounding the heart is called _____________.
plasmalemma
pleural membrane
tonoplast
pericardium