The tubular units that compose compact bone are called?
Answer: Osteons
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After observing variability among plant and animal species in various locations, Charles Darwin proposed an explanation for what he saw. The broad proposal included reasons that species could be modified through genetic variation, leading to measurable similarity and difference. Evidence for the proposal came from biological, geographic, and geological observations. His proposal allowed for the prediction of new species that might be found in new settings, based on environmental conditions. Darwin's proposal is an example of
A. a theory. B. an independent variable. C. a standardized variable. D. a dependent variable. E. a hypothesis.
The appearance of lungs was a(n) ____ that drove the evolution of land vertebrates
a. key innovation b. fixed trait c. inbred trait d. clade e. stabilizing allele
The goal of public health immunization is to reach herd immunity in the population
a. true b. false
Figure 11.3
The cell in panel 3 in the figure is in ___.
A. anaphase B. metaphase C. interphase D. prophase E. telophase