Humans can see objects as small as 0.1 mm. Leeuwenhoek's best microscope could magnify objects to 300X. Which of the following would be invisible using Leeuwenhoek's microscope?
A. Red blood cell, 8 ?m
B. Poliovirus, 30 nm
C. Pandora virus, 0.5 mm X 1 mm
D. Escherichia coli, 1 ?m X 4 ?m
Answer: B
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Which of the following correctly lists the three forms of nitrogenous waste in order from the one that requires the most water to eliminate it to the one that requires the least water to eliminate it?
A. uric acid, urea, ammonia B. uric acid, ammonia, urea C. urea, uric acid, ammonia D. ammonia, uric acid, urea E. ammonia, urea, uric acid
Which of the following bacterial-caused STDs
is resistant to all currently used antibiotics?
a. gonorrhea b. chlamydia c. siphilis d. trichomoniasis e. genital herpes
If light strikes a photopigment, the photoreceptor cell will decrease the amount of ________ it is releasing
Fill in the blank(s) with correct word
The key distinction between extrapolation and interpolation is that interpolation:
A. fills data gaps, while extrapolation fills beyond the extent of the data. B. involves linear functional forms, while extrapolation involves non-linear function forms. C. involves causal estimates, while extrapolation involves correlations. D. can be used with control variables, while extrapolation must be used in conjunction with instrumental variables.