| Lakes, ponds, rivers, and streams are ____ ecosystems. |
born |
| Trees that lose their leaves in the winter are called ____. |
deciduous |
| An elephant has a trunk and two large ____ tusks. |
dormant |
| Most amphibians are ____ in water. |
freshwater |
| A ____ seed is alive, but is not germinating. |
ivory |
| Wolves, raccoons, owls, and bats are ____ (active at night). |
nocturnal |
| A dirt-like material formed in bogs from decayed plants is ____. |
peat |
| Invertebrates are animals without a ____ column. |
spinal |
