According to fossil records, mammals
A. first appeared in the same geologic era, the Mesozoic, as dinosaurs.
B. first appeared in the current Quaternary period of the Cenozoic era.
C. lived in the same era, the Paleozoic, as reptiles, amphibians, and bony fishes.
D. did not appear until the Cenozoic era, after dinosaurs were extinct.
E. None of the answer choices is correct.
A. first appeared in the same geologic era, the Mesozoic, as dinosaurs.
You might also like to view...
If two populations are geographically restricted groups of the same species, but display one or more traits that are somewhat different, the two groups are sometimes classified as
A. subspecies B. phenotypes C. macrospecies D. genetic clones
What event occurs first in the process of hemostasis?
a. Platelets stick together. b. Platelets form a plug. c. An enzyme cascade activates thrombin. d. The injured vessel constricts. e. Fibrin forms a clot.
What type of an extracellular matrix does blood have?
a. gel-like b. matrix hardened by calcium and phosphorus c. fluid d. glycoprotein rich e. tightly packed with fibres
Select the best response to the question. ?What antibiotic is administered prophylactically for exposure to anthrax?
A) doxycycline B) penicillin C) levaquin D) ciprofloxacin