Electrons inside a shell travel in
a. straight paths.
b. orbitals
c. zigzag patterns
d. two dimensions
e. one dimension
B
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Red blood cells in mammals ____
a. have a large nucleus when they enter circulation b. do not have a nucleus when they enter circulation c. are the only cells to lack hemoglobin d. develop in the yellow marrow e. function as part of the immune system
The Protenor mode of sex determination is the ________
A) XO/YY scheme B) XX/XO scheme C) hermaphroditic scheme D) scheme based on F plasmids inserted into the FMR-1 gene E) scheme based on single translocations in the X chromosome
Examples of shapes in regulatory proteins that are used to bind to DNA include (check all that apply)
A. zinc finger. B. Doubledomain. C. helix-turn-helix. D. leucine zipper. E. TATA box.
How could you possibly become infected with adult tapeworms?
a) wading in contaminated water b) ingesting eggs in contaminated water c) eating freshly peeled fruit d) being bitten by a mosquito e) eating insufficiently cooked pork