When bone tissue first evolved in vertebrates, it was found within _____
A) an endoskeleton
B) an exoskeleton
C) a vertebra
D) a skull
E) a jaw
Answer: B
You might also like to view...
With regard to mitochondrial DNA:
A. Each mitochondrion has only one, circular DNA. B. The mitochondrial DNA molecule of animals is larger than that of plants. C. Each mitochondrion has multiple, circular DNAs. D. The nucleic acid in mitochondria is actually RNA. E. Mitochondrial DNA codes for 95% of the proteins needed in the mitochondria.
The agarose used in electrophoresis
A. interacts electrically with the DNA. B. chemically binds to the DNA. C. acts as a sieve. D. selectively sorts recombinant DNA from host DNA.
Which statement about stress is incorrect?
A) Stress increases as population density increases. B) Stress may trigger the release of specific chemical signals or pheromones. C) Stress can stimulate growth and increase the rate of reproduction. D) Stress may result in increased vulnerability to disease.
The class of fish that "Nemo" belongs to
A) hagfish B) osteichthyes C) chondrichthyes D) cartliaginous