For which discovery are Watson and Crick famous?
a. determining the presence of nuclein (DNA) in pus cells
b. determining the three-dimensional structure of DNA
c. determining the role of DNA as the genetic material
d. determining what chemical components are in DNA
Ans: b. determining the three-dimensional structure of DNA
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True or false: A species is a fixed evolutionary unit
A. true B. false
The equation (N/t)/N1 (where N denotes the size of a population and t represents time) is used to calculate:
A. a habitat's carrying capacity. B. the "available" percentage of a habitat's carrying capacity. C. a population's density. D. a population's intrinsic growth rate. E. Euler's number.
The objective, measurable evidence of disease evaluated by an observer is termed a/an ________.
A. inflammation B. symptom C. sign D. syndrome E. pathology
What statement below characterizes pigments’ function?
A. They absorb some photons. B. They reflect all photons. C. They absorb photons of all colors. D. They absorb photons of all wavelengths. E. They absorb ultraviolet wavelengths.