Using personal feelings to explain or describe is being
a. influential
b. objective
c. factual
d. subjective
Answer: d. subjective
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RNA differs from DNA in that
A) it is usually single-stranded. B) it is usually double-stranded. C) it has thymine instead of uracil. D) it has deoxyribose instead of ribose.
Class Reptilia includes all reptiles, and Class Aves includes all birds. However, a cladistics approach would place birds in the same class with reptiles. Why would a cladistician classify birds and reptiles in a single class despite the behavioral and physical differences between the two?
What will be an ideal response?
The highest magnification generally used to study
cells is provided by the a. transmission electron microscope. b. compound light microscope. c. phase contrast microscope. d. scanning electron microscope. e. Nomarski process light microscope.
Cardiac glycosides, molecules causing a drastic effect on vertebrate heart function, are produced as defensive chemicals by plants belonging to
A. the milkweed and dogbane families. B. the mustard family. C. the grass family. D. the poison ivy, oak, and sumac families. E. the bean family.