What do steroid hormones need to travel from one cell to another?
a. binding to transport proteins in the bloodstream
b. physical contact between the two cells
c. budding a vacuole from the plasma membrane
d. steroids travel freely through the bloodstream
a. binding to transport proteins in the bloodstream
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A cell that can divide to give rise to any cell type, including those of membranes that support the developing embryo, is
A) multipotent. B) a progenitor cell. C) a differentiated cell. D) totipotent.
In cocker spaniels, black coat color (B) is dominant
over red (b), and solid color (S) is dominant over spotted (s). In the F2 generation of a cross between BB ss with bb SS, what fraction of the offspring are expected to be black and spotted? a. 1/16 b. 9/16 c. 1/9 d. 3/16 e. 3/4
Which of the following is NOT one of the signs of aging in the skin?
a. increased collagen b. reduced fibroblasts c. increase in sweat glands d. less pigmentation in hair e. increased fat deposits
Name two types of protein modification that can occur in the ER but not in the cytosol
What will be an ideal response?