Question

1. A major evolutionary event in chordate evolution is represented by:

1. the occurrence of a body inversion, reversing the dorsoventral axis
2. the extension of the notochord, now present along its entire length
3. the larval stage being removed from development

1. Lamprey have an extended larval period, during which time this juvenile form is referred to as a(n) ___________________________.

Answer 1

1.The occurrence of body inversion, reversing the dorsoventral axis is a major evolutionary event in chordate evolutionary

2 lamprey have an extended larval period during which time this juvenile form is referred to as an parasitic form