Hormone leptin is produced by ____________________ cells.Fill in the blank(s) with the appropriate word(s)
fat
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What do you expect to be the relationship between population size and number of cultural traits?
A. The larger the population, the larger the number of cultural traits. B. The smaller the population, the larger the number of cultural traits. C. There is no relationship between population size and the number of cultural traits.
In the nitrogen cycle, which of the following involves bacteria converting nitrates into nitrogen gas?
a. denitrification b. nitrification c. ammonification d. eutrophication
Hemolytic disease of newborns comes about when the mother is ______ and the baby is ______
A. Rh positive; Rh negative D. Rh negative; Rh negative B. Rh negative; Rh positive E. more than one of these; more than one of these C. Rh positive; Rh positive
What factors contribute to genetic variation in populations?
What will be an ideal response?