Unit 3 Flashcards
Why are plants important? (10)
Primary source of food, produce oxygen, help keep us cool, renew energy, slow down wind,, hold soil in place, provided homes for wildlife, beautify surroundings, perfume air, furnish building materials and fuel
4 Basic Parts of a plant
Leaves, stems, roots, flowers
Leaves are the ____________ of the plant and vary in _____,_____,______
food factory, shape, size, arrangements
External Leaf Structure (5)
Petiole (Leaf stalk), Blade, Veins, Midrib (large center vein), Leaf margin (edge of plant)
Internal Leaf Structure (3)
Epidermis (skin of leaf), Gaurd cells (open and close stomata), Stomata (pore)
Transpiration
Evaporation of water through leaves and stems primarily through stomata
Water moves ___ in plants due to ______ and ______
up, cohesion, adhesion
Guttation
Plants force extra water from tips of leaves
Photosynthesis
Process where plants use light, CO2, and water to make oxygen and glucose
Chloroplasts
An organelle that makes food in plant cells, green colored because of chlorophyll
Respiration
Plants consume oxygen and release CO2 as it uses sugars to grow
Stem Functions (3)
Moves water and minerals up and food down, supports leaves and reproductive structures, food storage
External Stem Structures (3)
Lenticels (breathing pores), Bud Scale Scars (indicates old terminals, shows 1 year of growth), Leaf scars
Internal Stem Structures (2)
Xylem (cells that carry water and minerals up), Phloem (cells that carry sugar/food down)
Dicot Internal Stem
Xylem and Phloem and separated by cambium, constantly grow new cells
