Biology 2.1-2.2 Flashcards
living things composed of more than one cell
multicelluar organisms
a group
of structures designed to function together as a unit to perform a particular job for an organism
system
a structure within a system that has a definite form and performs a definite function or functions for the system
organ
three types of leafs
- broad and flat
- long and thin
- needle like
the flat portion of the leaf
blade
the large vine running through the leaf
midrub
what attaches the blade to the stem on a leaf
petiole
small leaf-like or scale-like structures that helped to cover the leaf when it was developing
stipules
contain developing leaf or stem structures
buds
have one blade on every petiole
simple leaves
have two or more petioles
compound leaves
The points at which leaves grow from the stem
node
When two leaves grow from each node
opposite
only one leaf grows from each node in an alternating pattern up the branch
alternate
When there are three or more leaves growing from each node
whorled
a cluster
of leaves growing around the base of the plant
rosette
More rapid growth on one side of the petiole than the other bends the petiole, thereby orienting the leaves to face the sun
phototropism
living material constructed in such a way to perform a particullar task
tissue
3 types of tissue
- structural tissue
- vascular tissue
- meristematic tissue
composed of elongated,tubular cells,are the super-connecting tissue
vascular tissue
transports water and dissolved minerals in leaves
xylem
transports food maufactured in the leaves downward
pholem
growth repair plant tissue
meristematic tissue
provides covering and protection for both the upper and lower leaf stipules
epidermis