Biology component two...Adaptations for Plant Transport

The topic where how plants are adapted to the environment of today (whether in extremely high, low or moderate climates)..in component two.

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What is the word equation for photosynthesis?
carbon dioxide+water-->sunlight+chlorophyll=oxygen + glucose
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what does the structure of the root contain within the stele?
xylem, phloem and the pericycle
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explain the 3 pathways that water and mineral ions take through the cortex to the xylem
Apoplast pathway-the route that involves water moving between spaces in the cellulose cell wall...Symplast pathway -water moves through the cytoplasm and plasmodesmata...Vacuolar pathway- involves water passing from vacuole to vacuole
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what are the walls of the endodermis coated with? and why is this a problem?
suberin... the apoplast pathway is blocked ...only the symplast pathway is accesible
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what components make up the structure of the xylem?...phloem?
xylem=vessels continuous column of hollow dead cells conduct water flow+tracheidssimilar to vessels but with tapered ends and more elongated, allow for sideways movement of water (has lignin)...phloem=sieve tubes-bidirectional movement+companion cell
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what is the definition of translocation?
translocation is the transport of souble organic materials produced by photosynthesis in the phloem.
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what is a source? what is a sink? give examples for both...
source=where photosythates are produced and exported(leaf)...sink=where photosythates are stored or used for growth (roots/shoots)
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what experimental evidence is there to prove the bidirectional movement in the phloem?
ringing experiments...aphid experiments...radio isotope labelling
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what is the definition of transpiration?
the evaporation of water from inside the leaf (mesophyll) out of the stomata into the atmostphere
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what are the factors affecting transpiration?
humidity... light intensity...temperature (increase)... wind speed
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what are the adaptations of Mesophytes?
deciduous plants- shed leaves during winter & regrow in spring...Non woody plants-produce cormbs and bulbs to store sugar when leaves and flowers die off ...Annual plants-during winter they are dormant but they reproduce and make seeds beforehand
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what are the adaptations of Hydrophytes?
little lignin in plant...xylem tissue is poorly developed...leaves have a thin waxy cuticle...stomata found on upper epidermis...stems and leaves have LARGE air spaces
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what are the adaptations of Xerophytes?
rolled leaves...sunken stomata...hairs on the surface of the leaf... thick waxy cuticle.
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Other cards in this set

Card 2

Front

what does the structure of the root contain within the stele?

Back

xylem, phloem and the pericycle

Card 3

Front

explain the 3 pathways that water and mineral ions take through the cortex to the xylem

Back

Preview of the front of card 3

Card 4

Front

what are the walls of the endodermis coated with? and why is this a problem?

Back

Preview of the front of card 4

Card 5

Front

what components make up the structure of the xylem?...phloem?

Back

Preview of the front of card 5
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