Which organism first appeared during the cenozoic era? a. cyanobacteria b. trilobite c. wolf d. dinosaur

is it b or a or d? i know its not wolf

C. wolf 

mammals flourished after the comet it earth and killed the dinosaurs

Spherical shaped cell might increase the surface area and decrease the volume.

The need activity of the nurse is to suction discharges from the trachea. current treatment approaches in the pressing consideration facilities or crisis offices are corticosteroids and nebulized epinephrine; steroids have demonstrated advantageous in extreme, direct, and even gentle croup. in the clear instances of croup, anti-microbials are not endorsed, as the etiology is viral