Hormones secreted by endocrine glands belong to all the following chemical categories except
A. glycoproteins.
B. steroids.
C. polypeptides.
D. amines.
E. carbohydrates.
Answer: E
Biology & Microbiology
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The sum of all of the values for a trait, divided by the total number of individuals, is called the standard deviation
Indicate whether the statement is true or false
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Some archaeal cells lack a cell wall.
Answer the following statement true (T) or false (F)
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Modern geologists estimate that the age of Earth is about
A) 450,000 years. B) 4.5 trillion years. C) 4.5 million years. D) 4,500 years. E) 4.5 billion years.
Biology & Microbiology
Membrane rafts are found in the cytoplasmic membranes of
A. archaea only. B. bacteria only. C. eukaryotes only. D. both archaea and bacteria. E. both archaea and eukaryotes.
Biology & Microbiology