The tall and short phenotypes in pea plants are examples of ____
a. polygenic traits
b. continuous traits
c. multifactorial traits
d. discontinuous traits
e. gene interaction
d
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Bird guides once listed the myrtle warbler and Audubon's warbler as distinct species. Recently, these birds have been classified as eastern and western forms of a single species, the yellow-rumped warbler
Which of the following pieces of evidence, if true, would be cause for this reclassification? A) The two forms interbreed often in nature, and their offspring have good survival and reproduction. B) The two forms live in similar habitats. C) The two forms have many genes in common. D) The two forms have similar food requirements. E) The two forms are very similar in coloration.
In the placenta, nutrients move from mother to baby by ____
a. activated transport b. the Rh factor c. transport proteins d. simple diffusion
e. HCGThe transfer of electrons from one compound to another is equivalent to __________ transfer
a. heat b. oxygen c. enzymatic d. phosphorus e. energy
A chronic, local allergy such as hay fever is considered ________.
A. systemic anaphylactic B. atopic C. delayed D. T-cell-mediated E. antibody-mediated