Biology Questions and Answers
Plant Physiology
- Why do plants need to
exchange gases with the
environment?
Plants need to do gas exchange becausethey create aerobic cellular respiration
(like animals)molecular oxy and they gen and to release need to getcarbon (^)
dioxide. Besides aerobic cellular
respiration pcarbon dioxide to maklants still need to gete photosynth (^) esis
and to release the molecular oxygen
that is the product of this reaction.
- What are the main gas
exchange organs of the
plants? How is the process
accomplished?
In the covering of the leaves and of the
primary structure oexchange is made through the cuticlef the stem gas (^)
and pores of the epidermis. In the
covering of the secondary structure othe stem of woody plants gas exchangef (^)
is madperiderm (small breaches of the cork).e through the lenticels of the (^)
The gas exchange in plants is
accomplished by simple diffusion.
- What is plant transpiration?
What are the two main types
of plant transpiration process?
Which of them is more
significant in volume?
Transpiration is ththe plant to the atmosphe loss of ere in the formwater from (^)
of vapor.
Transpiration occurs tof the epidermis (cuticularhrough the cuticle transpiration) (^)
or through the ostioles of (stomatal transpiration). Tthe stomatahe most
important is stomatal transpiration since
it is morregulated.e intense and physiologically
- What are stomata? How do
these structures participate in
the plant transpiration?
Stomataspecialized p (singular, stoma)assages for water are smalland
gases present iplants. As the plant nen the epidermis of theeds more or less (^)
to lose water and heat the stomata
respectively close oallowing the passagr open preventing e of gases by or
diffusion.
- What are the elements that
constitute the stomata?
The stoma is made of a central opening,
the ostiole, oguard cells responsiblr slit, delimitee for its closing ord by two (^)
opening. A substomatal chamber is
located under the ostiole.
http://www.biology-questions-and-answers.com