Topic 6) Photosynthesis Flashcards
what is the equation for photosynthesis?
carbon dioxide +water —-> glucose + oxygen
what are the factors that are above and below the arrow in the equation for photosynthesis?
sunlight
chlorophyll
what does sucrose make through photosynthesis?
starch
other molecules e.g. cellulose, lipids, proteins
glucose
why are leaves wide and flat?
to create large surface areas to absorb lots of sunlight
why are leaves thin?
so gases can reach cells easily
why do leaves have lots of veins?
so they can carry water to the cells and carry glucose away
what are the holes in the leaves called?
stomata
what are stomata for?
holes on the underside of the leaf through which gases move in and out
when glucose combine with minerals, what is made?
new chemical substances
when glucose combines with nitrogen, what is made?
proteins needed for growth
when glucose combines with magnesium, what is made?
chlorophyll needed for photosynthesis
where is the waxy cuticle found on the leaf?
the top of the leaf, waterproof layer
what does the waxy cuticle do?
stops water loss
where is the upper epidermis found on the leaf?
under the waxy cuticle
what does the epidermis do?
the outer most boundary, protects the leaf
where is the palisade layer found in the leaf?
under the upper epidermis, largest part of the leaf
what does the palisade layer do?
to prevent water getting out and stopping unwanted substances/organisms getting in
where is the spongy mesophyll/layer found in the leaf?
under the palisade layer, above the lower epidermis
what does the spongy mesophyll/layer do?
where gas exchange occurs
where is the vascular bundle found in the leaf?
between the palisade layer and the spongy mesophyll/layer
what does the vascular bungle do?
transfers water and glucose
where is the stomata and guard cells found in the leaf?
on the underside of the leaf
what do the stomata and guard cells do?
allows gases to move in and out of the cell
