Across
1
Group of similar cells
3
Substance with pH below 7
5
Path of a planet around the sun
7
Unit of energy
8
Biological catalyst
9
Curved glass that refracts light
Down
2
Center of an atom or cell
4
Magnetic metallic element
6
Unit of heredity
Group of similar cells
Substance with pH below 7
Path of a planet around the sun
Unit of energy
Biological catalyst
Curved glass that refracts light
Center of an atom or cell
Magnetic metallic element
Unit of heredity