What do echinoderms and chordates have in common?
A. endoskeletons
B. protostome development
C. ecdysis
D. dorsal nerve cords
Answer: A
You might also like to view...
According to the multiregional model,
a. Homo erectus populations migrated out of Africa. b. Homo erectus evolved further in regions beyond Africa. c. Homo erectus populations gave rise to races of Homo sapiens. d. Homo sapiens subpopulations originated in several separate locations. e. all of these are true.
Among the protist groups below, which has organisms that typically move with one or more flagella?
a. amoebozoa b. diplomonads c. apicomplexans d. foraminifera e. actinopods
An artificial pacemaker is a device that replaces the actions of the
A) atrioventricular node. B) ventricles. C) atria. D) sinoatrial node.
What test result indicates that the unknown can utilize citrate as its sole carbon source?
a. The medium turns pink. b. The culture becomes turbid. c. It turns the medium black. d. The medium turns blue.