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Researchers (Helle et al., 2004) analyzed rates of twin births in the Sami population of Northern Scandinavia during the eighteenth and nineteenth centuries. They found that (1) a baby born from a singleton pregnancy was more likely to survive to adulthood than a baby born from a twin pregnancy, and (2) the average number of offspring raised to adulthood was higher for women who had twins than for those who never had twins. These data suggest that in this population , human twinning rate was
a. under direction selection
b. under stabilizing selection
c. under disruptive selection
d. under sexual selection
e. undergoing genetic drift
Explain about the Simple Proteins? Simple proteins are those that are made of amino acid units just joined by peptide bond. Upon hydrolysis they yield a mixture of amino acids
What is the role of mitosis in growth?
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the tryptophan operon.
The oldest fossils look as though they were formed by organisms that resemble modern?
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function of topoisomerace?
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