第 1 單元，第 1 課

Exploring Life探索生命

背單字

cell細胞
A single bacterium is one cell.
cell theory細胞學說
The cell theory came from the work of several scientists.
light microscope光學顯微鏡
We stained the onion cells to see them under a light microscope.
electron microscope電子顯微鏡
An electron microscope showed the virus particles.
unicellular單細胞的
An amoeba is a unicellular organism.
multicellular多細胞的
Trees and people are multicellular.
stimulus刺激
Bright light is a stimulus that makes your pupils shrink.
homeostasis恆定性
Sweating helps maintain homeostasis on a hot day.
prokaryotic原核的
Bacteria are made of prokaryotic cells.
eukaryotic真核的
Plant and animal cells are eukaryotic.
organelle胞器
The nucleus is the largest organelle in most cells.

這課的重點字