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Lecture 60

BIOL 1010 Lecture 60: Lecture 60

3 Pages

Biological Sciences
Course Code
BIOL 1010
Emily A.Mc Kinnon

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OS82 Bio 1010 Monocot Stem
- vascular bundles are scattered
- Ground tissue in not separated (ie no cortex and pith region) Eudicot leaf
- epidermis is interrupted by tiny pores called Stomta(singular Stoma). - Stoma allow the exchange of CO2 and O2 between the surrounding air and the photosynthetic cells inside the leaf.
-Most water loss happen through stomata. Cells are loosely arranged around stomata, these air spaces allow for the CO2 and O2 circulation.
- Each stomata is flanked by 2 guard cells, which regulate the opening and closing.
- Ground tissue system of a leaf is called the mesophyll. (located between upper and lower epidermis).
- Mesophyll - consist mainly of cells specialized for photosynthesis.
- Veins within a leaf are the vascular bundles, this area of the plants vascular system is in close contact with the photosynthetic tissues. 22.6 -Most plant cells have 3 unique structures (in addition their similarities to eukaryotic cells)
- Chloroplast - the site of photosynthesis, ( light passes through the two membranes of the chloroplast and strikes green disks where light energy is converted to chemical energy. Sugar molecules produced by photosynthesis can be made into other molecules or broken down for energy.)
- Central vacuole -
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