The types of herbaceous plants changed at different times during succession. For example, ragweed (which grows well in full sun and completes its life cycle in one year) was very common in the first year after a farm field was abandoned, but less common in later years. In contrast, wild strawberry (which can grow in partial shade and grows back each spring from its roots) was more common in years 25-40. Explain the likely reasons for these changes in the types of plants at different times during succession.

The cluster of developing cells from conception until birth is called an

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano