24 terms

Life Science Chapter 10

Structure and Function of Plants
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Terms in this set (...)

kingdom Plantae
multicellular eukaryotes that photosynthesize, contain cell walls, have complex organ systems
botany
the scientific study of plants
node
The point of attachment of a leaf on a stem.
taproot system
Root system made up of one large root and many small, thin roots
fibrous root system
A root system made up of many roots that are about the same size
woody stem
Rigid stems made of wood and bark
herbaceous stem
Softer, more flexible, and often green plant stems
vein
transport sugar and water in a leaf
xylem
Transport vessels in plants that carry water and minerals from the soil to the leaves
phloem
Transport vessels in plants that carry sugars from the photosynthetic leaves to the rest of the plant by active transport
vascular bundle
A strand of vascular tissues (both xylem and phloem) in a plant stem.
fiber
strong, narrow cells that help support the plant
epidermis
the outermost covering of many plant parts that protect the plant from water loss
stomata
Microscopic pores in the leaf which lets CO2 in and O2 out. Also where water is lost.
guard cell
Pairs of cells that surround stomata and control their opening and closing.
transpiration
Evaporation of water from the leaves of a plant
palisade layer
the layer of cells in a leaf where most photosynthesis occurs
Closely packed cells under the epidermis of leaves
spongy layer
loosely packed layer of photosynthetic cells
hormone
Chemical messengers produced by an organism to control certain body functions
tropism
A growth response of a plant toward or away from a stimulus
phototropism
A growth response to light
thigmotropism
A growth response to touch
gravitropism
A growth response to gravity
photoperiodism
flowering plant response to differences in the length of day and night

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