Unformatted text preview: 21. It is perhaps surprising to learn‘that is by far the most common
form of phyllotaxy. But when one sees how it maximizes , it
makes sense. a. alternate / shading of older, more mature leaves
spiral / light capture by actively photosynthesizing leaves.
or alternative / appearance of“ runways’ ’for pollinators.
df' opposite / ability of the plant to avoid being blown over.
9. spiral / attractiveness and therefore marketability of ﬂowers. 22.8ix-inch long, thin trichomes on some cactus species is an example of
“evolutionary tinkering” because a. each plant adjusts its trichomes’ length in response to sunlight.
trichomes served another purpose for these plants’ ancestors.
’6 there’s a surplus of solar energy in the desert, so cacti experiment.
41/ cactus breeders thought there’d be a market for weird hairy plants.
ﬁe." there’s no rational reason why plants would grow such things. 23.Which of the following describes the correct organization of the chloroplast,
where “<” indicates “is inside of’ ? a./stroma < thylakoid lumen < thylakoid membrane
b. thylakoid membrane < envelope < stroma
c/stroma < granum < chloroplast dz granum < cytoplasm < stroma /. /’thylakoid lumen < granum < stroma 24.The morphologies of palisade mesophyll and spongy mesophyll have evolved
to maximize r,espectively. be light penetration and gas exchange
surface area and cell volume gas exchange and surface area
cell volume and light penetration
surface area and gas exchange Qua; ...
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- Spring '08