Different molecular forms of the same gene are __________.
Fill in the blank(s) with the appropriate word(s).
alleles
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The job of a natural killer cell is to:
A. release histamine. B. destroy invading pathogens through phagocytosis. C. destroy infected or abnormal host cells. D. trigger inflammation.
In the 1700s, ____ classified organisms by their morphological similarities and differences, and in the 1800s, ____
provided the scientific rationale for the heritable basis of these morphological variations.
a. Mendel; Linnaeus b. Darwin; Linnaeus c. Linnaeus; Darwin d. Linnaeus; Mendel e. Mendel; Darwin
Simple diffusion
A. moves molecules against a concentration gradient. B. cannot occur without a membrane present. C. requires energy. D. utilizes proteins to move molecules across a membrane. E. does not require energy.
Bt crops contain a gene making them resistant to common herbicides. Indicate whether the statement is true or false