3. members of this class of chordates have no true teeth or jaws, have a spinal cord, and multiple hearts. a. bony fish b. reptiles c. jawless fish d. amphibians

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun

Interacting group of various species in a common location. for example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.