The key derived character of the lobe-finned fish is the
A) lateral line system.
B) series of rod-shaped bones in their pectoral and pelvic fins.
C) operculum.
D) flattened scales covering their skin.
Answer: B
You might also like to view...
Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely. B. decreased arithmetically in numbers while the nutrients available increased geometrically. C. increased arithmetically in numbers while the nutrients available only increased geometrically. D. increased geometrically in numbers while the nutrients available only increased arithmetically. E. increased geometrically in numbers while the nutrients available increased arithmetically.
Which of the following is found in the intestine of termites and produces enzymes needed to digest wood particles?
A. Trichomonas B. Nyctotherus C. Giardia D. Trichonymphida
The prokaryotic group that tends to inhabit extreme environments belongs to ________.
A) Protista B) Archaea C) Euglena D) Bacteria
What does the term "arbovirus" mean?
A. The virus is vectored by arthropods. B. The virus has a segmented genome. C. The virus causes disease characterized by joint pain. D. The capsid of the virus has a branching, tree-like structure. E. The envelope readily adheres to fomites.