If someone has a predisposition to cancer, what genetic circumstance likely exists?
What will be an ideal response?
a germ-line mutation in a proto-oncogene or tumor suppressor, which is inherited
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There are cases, particularly in fruit flies, in which a normal body part grows in the wrong spot. For instance, legs on the head growing instead of antennae, or a second set of wings behind the normal pair. What can explain this?
A. These are due to the reappearance of stem cells, which are totipotent. B. These are due to misregulation of hormones from environmental contamination with pesticides. C. These occur as a result of mutations in homeotic genes, which normally act to direct development along the anterior-posterior axis. D. These naturally occur sometimes in animals that have metamorphic development, due to different organization of homeotic gene expression in larvae versus adults.
The general order of classification below the domain or kingdom level is
A. phyla, class, family, order, genus, species. B. phyla, order, class, family, genus, species. C. phyla, order, family, class, genus, species. D. phyla, class, order, family, genus, species.
Which cycle relies heavily upon bacteria?
a. water b. carbon c. nitrogen d. phosphorus e. sedimentary
Industrial melanism is a term
A. describing the color change induced by living in industrialized areas. B. describing the widespread implementation of pollution controls. C. describing the evolutionary process in which initially light-colored organisms become dark as a result of natural selection. D. explaining that the darker moths have higher mutation rates because of industrialization. E. explaining that the darker moths having higher reproductive success because of their pigmentation.