Plants Flashcards
4 plant tissues
dermal, ground, vascular, meristematic
4 plant organs
leaves, stem, root, reproductive structures
stomata function
gas exchange
cuticle function
protection, prevent water loss
vascular bundles
contains xylem and phloem for transport
mesophyll
Palisade—photosynthesis
Spongy—gas diffusion
production of sugars through photosynthesis
4 stem types
Herbaceous/woody dicots, herbaceous/woody monocots
how are annual rings produced
xylem moves inside and dies, older phloem sloughs off
what is transpiration
evaporation of water from leaves
mechanisms that allow water transport through xylem
Capillary action, root pressure, transpiration pull
what is translocation
movement of sugars within phloem
what is pressure flow theory
how moment occurs in phloem
source?
tissue where sugar enters phloem
sink?
tissue where sugar exits phloem
what occurs in pressure flow theory
Sugar/other solutes actively pumped in/out of sieve tubes from source or into sink; water flows due to osmosis. movement in sieve results from flow down pressure gradient