| A | B |
|---|
| seed | a plant embryo capable of germinating to produce a new plant |
| embryo | the beginning stage of a plant |
| germinate | to begin to grow, to sprout |
| sprout | a young plant growth; a bud or a shoot |
| sapling | a young tree normally more than 4.5 ft. (1.5m) high and less than 4 in.(10 cm) in diameter |
| seedling | a young tree grown from a seed up to a sapling |
| mature tree | complete and finished in growth |
| dead tree | no longer alive |
| rotting log | decay or decomposition caused by fungi, bacteria, insects, and plants |
| humus | a black or brown layer of partially or wholly decayed plant matter that provides nutrients for living plants |
