Discuss the derived characters of birds highlighting adaptations that facilitated flight.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

What is the term for a water wave that is created by an underwater earthquake?

Can happen anywhere along the spine if the neural tube does not close all the way. the backbone that protects the spinal cord does not form and close as it should. this often results in damage to the spinal cord and nerves. a) cleft palate b) spina bifida c) encephalocele d) down's syndrome