Sucrose is composed of:
a. a molecule of glucose and galactose.
b. two molecules of glucose.
c. a molecule of glucose and a molecule of fructose.
d. a molecule galactose and fructose.
e. two molecules of fructose.
C
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Which statement about the fate of progenitor cells in Caenorhabditis elegans is not correct?
A. The fate of progenitor cells is determined by their proximity to the anchor cell, which secretes epidermal growth factor. B. Epidermal growth factor binds and activates a transmembrane receptor protein in the cell nearest to the anchor cell. C. In the cell closest to the anchor cell, genes for differentiation into a type 1 cell are activated by epidermal growth factor binding to its receptor. D. Following epidermal growth factor receptor activation, the cell closest to anchor cell inhibits adjacent cells from differentiating to type 1 cells. E. Differentiating into a type 2 cell occurs spontaneously without the need for special genes for type 2 differentiation.
Clays do not facilitate the formation of phospholipid bilayers
What will be an ideal response?
The oceanic zone is represented by letter ____
a. A b. B c. C d. D e. E
A species has 6 chromosome pairs in each diploid cell. How many genetically unique gametes could be produced from sexual reproduction in this species, accounting only for independent assortment?
A. 64 B. 8 C. 36 D. 9 E. 16