The cells that are full of water and rigid are called ________.
support cells
flaccid
turgid
none of the above
Stomata open and close due to _____________.
presence of valves
hormonal control
turgor pressure of guard cells
concentration gradient of the gases
The main cells present in lymph are ___________.
red blood cells
platelets
lymphocytes
monocytes
The double membraned structure surrounding the heart is called _____________.
plasmalemma
pleural membrane
tonoplast
pericardium
The colour of blood in the arteries is _________
bright red
dark red
blue
black
The roots absorb water through _______________.
epidermal hairs
root hairs
root xylem
root phloem
Deoxygenated blood is carried by _____________.
pulmonary artery
hepatic vein
renal vein
all of the above
Blood fails to clot in the absence of __________.
magnesium
calcium
sulphur
potassium
Pulse beat is measured in _____________
nerve
artery
vein
heart
Minerals are absorbed into the cells by _____________.
osmosis
diffusion
active transport
a, b or c
