If an organism inherits one dominant and one recessive allele, the phenotype of this organism will look like which of the following?
a. the dominant allele
b. the recessive allele
c. both the dominant and recessive allele
d. neither the dominant or recessive allele
a. the dominant allele
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The process of natural selection results in Select all that apply.
_____ Extinction. _____ Random genetic mutations. _____ Adaptation. _____ Speciation.
In an unchanging environment, a well-adapted population is likely to experience no natural selection
of any kind.
Indicate whether the statement is true or false.The addition of excess phosphorous causes lakes to become eutrophic because the nutrients trigger
blooms of photosynthetic cyanobacteria. Why do these blooms cause low oxygen levels in lakes?
a. Cyanobacteria use up more oxygen than they produce. b. Excess phosphorous binds to dissolved oxygen in the water. c. Cyanobacteria are net producers of oxygen while alive, but when they die aerobic bacteria use oxygen while decomposing them. d. Cyanobacterial blooms only occur in waters naturally low in oxygen. e. Cyanobacteria are aerobic heterotrophs, consuming oxygen and producing carbon dioxide.
Clubfoot and cleft palate are traits
A. that are congenital birth defects. B. that have discontinuous distribution. C. that are multifactorial. D. whose distribution can best be explained by the threshold model. E. that have all of these characteristics.