| Question |
Answer |
| blade |
the broad, flat part of a leaf |
| petiole |
the narrow, stem-like part of a leaf |
| vein |
small, tube-like structures that carry water and other substances throughout a plant |
| epidermis |
a thin, tough layer of cells on the outer surface of a leaf's blade |
| cuticle |
a waxy covering on the upper surface of most leaves that protects from injury and water loss |
| mesophyll |
the middle cells of a leaf that have roles in photosynthesis |
| stoma |
an opening between two guard cells |
| stomata |
multiple openings (the plural for stoma) |
| guard cells |
a pair of sausage shaped cells on lower surface of most leaves that control formation of stomata |
| transpiration |
the process by which water passes out of the stomata of a leaf and into the environment |
| photosynthesis |
process by which chlorophyll containing cells (chloroplasts) trap and use energy from the sun to combine carbon dioxide and water into glucose for food, releasing oxygen as a waste product |
| glucose |
food produced through photosynthesis, stored in the plant cells until needed |
| palisade cells |
tightly packed cells of mesophyll that contains lots of chloroplasts for photosyhnthesis |
| spongy layer |
loose area of mesophyll providing room for water, oxygen and carbon dioxide to travel within the leaf |
| stomatal unit |
a pair of guard cells and the stoma they form |
| What are the ingredients for photosynthesis? |
energy from sunlight, water from roots, carbon dioxide from air |
| What is formed from photosynthesis? |
glucose and oxygen |
| What comes in stomata? |
carbon dioxide |
| What goes out stomata? |
water and oxygen |
| How does a stoma open? |
If the leaf has too much water, water will enter the guard cells causing the to swell and buckle. The opening formed is the stoma. |
| How does a stoma close? |
As excess water is released out the stoma, the guard cells start to lose water and unswell. The gradually closes the stoma. |
Buen Viaje lv.2 ch 8
