When Mendel crossed purple-flowered pea plants with white-flowered pea plants, he never got offspring with flowers that had an intermediate color. This was counter to the theory of  

A.  independent assortment.
B.  blending inheritance.
C.  direct transmission of traits.
D.  segregation of alleles.
E.  continuous variation of traits.


B.  blending inheritance.

Biology & Microbiology

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Which fungal condition is most often detected in the bone marrow?

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The voltage across a membrane is called the ____

a. electrochemical gradient b. turgor pressure c. membrane potential d. chemical gradient e. electron potential

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How did Zhang and Cech purify the RNA molecules that were able to catalyze the linkage between two amino acids?

a. passing the reaction mixture through a column that binds biotin b. passing the reaction mixture through a column that binds all proteins c. passing the reaction mixture through a column that binds RNA d. centrifuging the reaction mixture to concentrate the proteins e. centrifuging the reaction mixture to concentrate the RNA molecules

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Osteoporosis may occur when the activity of ________ exceeds the activity of ________

A) osteoblasts; osteoclasts B) osteocytes; osteoclasts C) osteoclasts; osteocytes D) osteoclasts; osteoblasts

Biology & Microbiology