b8 Flashcards
State the different organs in plants
Roots, stem, leaves.
State the different tissues in a leaf
Wax cuticles, upper/lower epidermis, palisade mesophyll, spongy mesophyll, stomata.
Give the role of the wax cuticles
Waterproof the leaf, prevent pathogenic entry.
Give the role of the upper/lower epidermis
Skin-like, protective layer.
Give the role of the palisade mesophyll cells
Photosynthesis. They are found at the top of the leaf and contain chloroplasts.
Give the role of the spongy mesophyll cells
Air spaces to allow gases to diffuse.
State what the stomata are
Holes on the underside of a leaf. Controlled by guard cells.
Give the role of the stomata
Open and close to allow gases into and out of the leaf.
List the resources needed for photosynthesis
Water (Roots). Carbon dioxide (through stomata). Sunlight.
State the products of photosynthesis
Oxygen and glucose.
Give the word equation for photosynthesis
Carbon dioxide + water → glucose + oxygen.
Suggest what a plant uses glucose for
Respiration. Store it as starch as an energy store. Making proteins, fats, and oils for growth and repair.
List the 3 factors that affect the rate of photosynthesis
Temperature, light intensity, carbon dioxide.
Give the role of the xylem cells
Transport water and mineral ions from the roots to the leaves in the transpiration stream.
Give the role of the phloem cells
Transport dissolved sugars from the leaves to the rest of the plant in translocation.
