Being born with extra fingers on a hand is called polydactyly. This is more common in some populations in North America than others due to ________.
A. random mating with other populations in North America
B. natural selection in favor of extra fingers in these populations
C. a founder effect because their ancestors from Europe carried the alleles
D. migration of people with multiple fingers out of the population
E. an increase in mutation rate in these populations
Answer: C
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Over the past 100 years, the decrease in deaths due to infectious disease has been somewhat offset by an increase in death due to metabolic diseases.
Answer the following statement true (T) or false (F)
The hinge region is indicated by number
a. 1. b. 2. c. 4. d. 5. e. 6.
The outcome of meiosis, which includes two nuclear divisions, is ______ daughter cells with the ______ chromosome number
A. haploid B. diploid C. 2 D. 4
Which of the following organs also produce hormones as a secondary function of the organ?
A. adrenal cortex B. testes C. thyroid D. ovaries E. heart