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a)are found only in the guard cells
b)are concentrated in the stomata
c)are concentrated in a portion of the leaf the stroma
d)are concentrated in the mesophyll cells
e)are found in the mitochondria matrix

2007-05-03 15:45:04 · 3 answers · asked by rose 1 in Science & Mathematics Biology

3 answers

D is correct.
A: guard cells are those that control the opening and closing of the stomata.
C: stomata are the pores in plants that allow them to take in gases, both CO2 for photosynthesis and O2 for cellular respiration.
C: the stroma is a fluid between the grana of plant cells; it is where the Calvin cycle occurs.
E is just wrong; the mitochondrial matrix is the term for the membranes inside the mitrochondria that allow for a chemiosmotic gradient for the production of ATP.
Mesophyll cells are found in an internal layer of the plant. They are found in two layers: the spongy mesophyll and the pallisade mesophyll. The latter has way more chloroplasts than the former.

2007-05-03 15:52:17 · answer #1 · answered by Sci Fi Insomniac 6 · 2 0

D. The mesophyll cells are particularly designed to carry on photosynthesis. They contain most of the chloroplasts.

Guard cells do have chloroplasts, but they aren't the only cells with chloroplasts.
Stomata are holes, not cells.
The stroma is the matrix inside the chloroplast.
Mitochondria don't have anything to do with this question.

2007-05-03 22:49:46 · answer #2 · answered by ecolink 7 · 0 0

D. the mesophyll cells contain most of the chloroplasts.
guard cells have them but.. these^ have more. the stomata are just found on the undrside of leaves to help the plant respirate and photosynthesise. the smitochindria matrix dont have many if at all.. i cant remebre

2007-05-03 23:06:12 · answer #3 · answered by boooo 3 · 0 0

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