Most epidermal cells are ___
a. melanocytes
b. keratinocytes
c. collagenocytes
d. phagocytes
e. erythrocytes
B
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Which statement best describes the evolutionary significance of mutualism?
A) Mutualism offers more biodiversity to a community. B) Individuals partaking in a mutualistic relationship are more resistant to parasites. C) Interaction increases the survival and/or population growth rate(s) of mutualistic species. D) Mutualistic interaction lessens competition in communities where it is present. E) Mutualistic relationships allow organisms to synthesize and use energy more efficiently.
In general, the first signs of puberty occur earlier in life for girls than for boys
Indicate whether the statement is true or false
Fructose and galactose both have six carbon atoms, twelve hydrogen atoms and six oxygen atoms, just like glucose. A friend of yours says: "Since those sugars have the same number of atoms, they should have the same name." You answer: "While they do have the same number and type of atoms,
A. they are named differently because of their quaternary structures, which is very important in carbohydrates, especially glucose." B. they are all polysaccharides and have slightly different functions within organisms and therefore have different names." C. they are named differently because they are involved in different DNA nucleotide formation." D. they are named differently because when heated above their optimal temperature they become denatured and will not react with their substrates." E. they are named differently because they are alternate forms of the monosaccharide, glucose."
The long-distance movement of substances in plants is called ________.
A. Antiport B. Translocation C. Symport D. Transpiration E. Osmosis