Across
1
Mass per unit volume
4
Reddish electrical conductor
6
Biological catalyst
8
Ball of burning gas in space
Down
2
Path of a planet around the sun
3
Nerve cell in the brain
5
Group of similar cells
7
Unit of heredity
Mass per unit volume
Reddish electrical conductor
Biological catalyst
Ball of burning gas in space
Path of a planet around the sun
Nerve cell in the brain
Group of similar cells
Unit of heredity