What drew african americans to the cities in the north during the great migration? select the two correct answers.

Astudy group should stay around 3-6 people. true or false

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.