Which of the following is NOT used in the

development of science?
a. evaluation of data
b. personal conviction
c. prediction
d. systematic observation
e. sharing ideas


Answer: b

Biology & Microbiology

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In an effort to determine the mechanism of neuronal signaling, Otto Loewi isolated ____

a. frog hearts b. frog brains c. rat hearts d. rat brains e. rat vagus nerve

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Discrete packages of light energy are called:

a. pigments b. photons c. positrons d. radioactive waves e. electromagnetic particles

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________is defined as a person's genetic makeup

a) Genotype b) Phenotype c) Heritable trait d) None of the above

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Under the microscope, you observe the first few cell divisions of an embryo. Instead of dividing the entire ball, the divisions are only separating the top half into smaller and smaller spheres. The bottom half appears to remain as one large cell. What is a likely explanation?

A. Gastrulation has occurred. B. A developmental error has occurred. C. The bottom half is the notochord. D. It is a bird or fish embryo.

Biology & Microbiology