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a molecule that contains only atoms of carbon hydrogen and oxygen in a ratio of 1:2:1
tissue like stem cells where they are undifferentiated and are found in places where growth can occur (They become specialized)
- Seed structure in angiosperms (flowering plants) that stores and supplies nutrients to embryo
- Monocot- veins paralell
- Eudicot- veins branched
an organelle which is the site of photosynthesis
A pigment that undergoes physical or chemical change under light
the stalk that attaches leaf to stem
arrangement of veins within a leaf
waxy covering found on epidermis cells of plants that protects leafs and prevents water loss
Tiny holes in epidermis layer that allows gasses in and out
- Small seedless plants with no vascular tissue,no true stem, leaves or roots,
- mosses and cannot grow tall.
Lycophytes and pterophytes
seedless plants with vascular tissue, allows for tall growth
most dominant on earth, not dependent on water for reproduction, develops sperm and pollen
Plant embryo and a food supply covered with protective coating.
Functions of leaf
- Main site for photsynthesis
- traps sunlight
- site for gas exchange
- cell respiration
- in some cases protection against herbivores
- single outer layer
- provides protection against invaders
- Palisade - long, rectangular cells
- filled with chloroplasts, in upper epidermus
- Spongy - loosely packed cells, space for gas exchange
- lower epidermus
paired cells that open and close the stomata.
plants with stems not wood.
plants with wood stems
- arrangement of vascular tissue - xylem and tissue
- In herbaceous plants
- Meristematic cell layer in vascular tissue
- In woody plants
- Divides to form new xylem and phloem