Obesity has a variety of causes but a primary contributing cause is
A. inactive lifestyle.
B. consumption of snack foods.
C. portion sizes in restaurants.
D. All of the above appear to be involved.
D. All of the above appear to be involved.
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A DNA barcode is being developed for use in conservation biology based on ____
a. mitochondrial genes in plants b. chloroplast genes in plants c. nuclear genes in animals d. mitochondrial genes in animals e. bacterial genes
C14 is a radioactive isotope, and due to its predictable
__________ rate it is used to date organic fossils. Fill in the blank(s) with the appropriate word(s).
The animals most likely to be used for
xenotransplantation of organs into humans are a. goats. b. sheep. c. cattle. d. pigs. e. dogs.
Which element is the basis for the macromolecules found in living things?
A) carbon B) hydrogen C) nitrogen D) oxygen