In genetic goitrous cretinism, the phenotype is caused by accumulation of thyroid hormone and its breakdown products
a. True
b. False
False
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The physical features and chemical composition of the rocks that contain fossils provide information about the ____ in which the fossil organisms lived
Fill in the blank with the appropriate word.
Maternal blood mixes directly with the embryo’s blood in the placenta
a. True b. False
How did Wallace contribute to the history of ideas about evolution?
A) He proposed the idea that Earth is very old. B) He was the main opponent of Darwin's ideas immediately after they were published. C) He proposed the theory of inheritance of acquired characteristics. D) He proposed a theory of evolution similar to Darwin's.
The term specific activity differs from the term activity in that specific activity:
A) is measured only under optimal conditions. B) is the activity (enzyme units) in a milligram of protein. C) is the activity (enzyme units) of a specific protein. D) refers only to a purified protein. E) refers to proteins other than enzymes.