sci 8 test Flashcards
cell
the smallest thing
tissue
a group of cells
organ
a group of different tissues
organ system
a group of organs
what are the smallest living things consider to be alive?
cells
eyepiece
to see
coarse adjustment knob
adjust by moving
fine adjustment knob
to see (focus)
objective lenses
4x, 40x, 100x, 400x
revolving nose piece
to rotate the lens
all cells have a
cell membrane
sugar and cell walls are only in
plant cells
the nucleus is like the
brain
the mitochondria is like the
power house
cells in your body must be specialized. what does it mean to be specialized?
means that every type of cell has a very specific and unique job to do
do not have specialized cells
disadvantage
only one cell so less can go wrong
advantage
smaller (easier preyed upon)
disadvantage
cannot move to find food
disadvantage
reproduce rapidly
advantage
need less food
advantage
can only live in watery environments
disadvantage
50x
vacuole
500x
mitochondria
