Across
1
Substance with pH above 7
4
Unit of heredity
5
Gas essential for breathing
6
Group of similar cells
8
Basic unit of life
Down
2
Tectonic landmass section
3
Mass per unit volume
7
Biological catalyst
9
Our home planet
10
The Red Planet
Substance with pH above 7
Unit of heredity
Gas essential for breathing
Group of similar cells
Basic unit of life
Tectonic landmass section
Mass per unit volume
Biological catalyst
Our home planet
The Red Planet