What was the major stumbling block for the acceptance of natural selection as a mechanism for

evolution when proposed by Darwin?



a. strong evidence for inheritance of acquired traits
b. lack of a fossil record
c. lack of a plausible theory of heredity
d. lack of evidence for artificial selection
e. lack of observational and experimental data


C

Biology & Microbiology

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Which two types of tissue are responsible for rigid support in a plant?

a. cork and fibers b. phloem and fibers c. phloem and xylem d. xylem and fibers

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A test which uses specific monoclonal antibodies to detect the presence of a pathogen (such as an indirect ELISA) is classified as a molecular genomic technique.

Answer the following statement true (T) or false (F)

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Morphological or molecular characters shared by members of a clade are called ______

A) common ancestors B) paraphyletic groups C) homoplasys D) monophyletic groups E) synapomorphies

Biology & Microbiology

A species that three sets of homologous chromosomes can have ________ different combinations of chromosomes in its gametes.

A. 6 B. 27 C. 8 D. 64 E. 3

Biology & Microbiology