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Plants

Terms

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response
an organism's reaction to the stimulus (either towards or away from it)
stimulus
anything in the environment that causes an organism to change
tropism
a plant's response to an external stimulus
positive tropism
towards the stimulus
negative tropism
away from the stimulus
plant stimuli types
- Light...phototropism - plant grows towards the light - Light...photoperiodism - plants response to the number of hours of daylight and darkness it receives - Gravity...gravitropism, ex. roots grow downward because of gravity
nonvascular
- no specialized tissue - rhizoids instead of roots - reproduce using spores, not seeds - stem and leaf like - grow close to ground moist areas - food for worms and hold soil - ex. moss, liverwort, hornwort
vascular
- special tissue - xylem - transports water - phloem - transports sugar and nutrients - cambium - found in trees - "True" roots, leaves, stems ex. seedless = horsetails, clubmosses, ferns seeds = flowers, trees, fruits
rhizoids
small, root-like structures that help absorb water
xylem
transports water
phloem
transports sugar and nutrients
cambium
found in trees
gymnosperms
vascular plants that produce seeds NOT protected by fruits -no flowers -needlelike -conifers: "cone bearers" (pines, furs, spruces) -produce male and female cones for reproduction ex. evergreen trees
angiosperms
produce flowers and/or fruits with seeds -Monocotyledon -Dicotyledons -Cotyledon - food supply for baby (plant) embryo
monocots
- flower parts (petals) are in multiples of 3 - long and narrow leaves (veins of leaves) -scattered bundles of tissue ex. corn, rice, wheat and barley, bananas, lilies
dicots
- flower parts (petals) are in multiplies of 4 and 5 - network (branching) of veins in leaves - tissue bundles are organized - ex. maple, oak trees, peanuts, apples, green beans
pollination
the process of transportation the pollen to the stigma
germination
the growth of a plant from a seed
fertilization
when the two gametes come together to form a zygote
Flower Diagram

Deck Info

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