The mass extinction that was most likely caused by the formation and retreat of glaciers was the extinction
a. cretaceous- tertiary
b. end triassic
c. permian- triassic
d. late devonian
e. ordovician- silurian

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?