Which of the following subatomic particles has appreciable mass, but no charge?
a. proton
b. both proton and neutron
c. Electron
d. neutron
Ans: d. neutron
Biology & Microbiology
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________ is the name given to DNA characterization based upon digestion of DNA with specific restriction enzymes.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Which forms the outermost whorl of flower
parts? a. sepals b. petals c. anthers d. carpels e. stamens
Biology & Microbiology
Which diagram, A or B, corresponds to an “open” circulatory system?
1.A
2.B
Match the terms with the labeled structures on the diagram. 
myelin sheath
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology