Multiple Choice QuestionsThe function of surfactant is/are
facilitating lung expansion
maintaining the stable size of the alveoli
to reduce the surface tension on the alveoli
all of the above
Two chief functions of the leaves are
photosynthesis and respiration
photosynthesis and transpiration
transpiration and respiration
respiration and digestion
The organism in which Kreb's cycle does not occur in mitochondria is
yeast
E.coli
Ulothrix
mould
The plant undergoes wilting when
xylem is blocked
cambium is blocked
phloem is blocked
some roots are reduced in number
Stomata open at night and closes during day in
xerophytes
gametophytes
mesophytes
mesophytes
A.
xerophytes
Crassulacean acid metabolism, also known as CAMphotosynthesis, is a carbon fixation pathway that evolved in some plants as an adaptation to arid conditions. In a plant using full CAM, the stomata in the leaves remain shut during the day to reduce evapotranspiration, but open at night to collect carbon dioxide (CO2).
Lucocytes (WBCs) are considered as true cells because
they possess nucleus
they do not contain haemoglobin
they show great power of movement
they are responsible forphagocytic activity
During muscle contraction
size of 'A' bands remain same
size of 'H' zone becomes smaller
size of 'I' band decreases
diameter of fibre increases
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