横向
1
Tissue that contracts for movement
5
Form of thermal energy
7
Group of similar cells
8
Push or pull on an object
12
Unit of heredity
纵向
2
Smallest unit of an element
3
Our home planet
4
Element found in all living things
6
Biological catalyst
9
Disturbance that transfers energy
10
Infectious microscopic agent
11
Unit of power
13
Unit of electric potential