横向
1
Unit of heredity
4
Positive particle in nucleus
5
Smallest unit of an element
6
Preserved remains of ancient life
纵向
2
Group of similar cells
3
Amplified beam of light
7
The Red Planet
8
Reddish electrical conductor
Unit of heredity
Positive particle in nucleus
Smallest unit of an element
Preserved remains of ancient life
Group of similar cells
Amplified beam of light
The Red Planet
Reddish electrical conductor