Across
1
Tissue that contracts for movement
4
Hottest planet in solar system
5
Unit of heredity
6
Unit of energy
9
Substance with pH below 7
11
Compound containing oxygen
Down
2
Curved glass that refracts light
3
Biological catalyst
4
Unit of electric potential
7
Naturally occurring inorganic solid
8
Natural satellite of Earth
10
Group of similar cells