Refer to Figure 30-1. The development pattern labeled Type A is characteristic of:
a. ctenophores.
b. chordates.
c. cnidarians.
d. annelids.
e. echinoderms.
D
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Chagas disease is caused by:
a. Trypanosoma rangeli. b. Trypanosoma cruzi. c. Trypanosoma brucei rhodesiense. d. Trypanosoma brucei gambiense.
A(n) ________ carries a specific amino acid to a ribosome, where the amino acid bonds to another.
A) mtDNA B) rRNA C) mRNA D) tRNA
What area of water serves as nursery grounds for many species of marine fishes and invertebrates?
A. Photic zones B. Benthic zones C. Estuaries D. Pelagic zones E. Limnetic areas
In a circulatory system with double circulation, __________.
a. blood is pumped at two separate locations as it circulates through the body b. blood is pumped twice by the same heart in order to complete a cycle of picking up oxygen and delivering it to the tissues c. there is a countercurrent exchange in the gills d. hemolymph circulates both through a pumping blood vessel and through body sinuses e. there are always two atria per heart ventricle