Biological magnification of persistent toxins would be greatest in a
A. deer.
B. oak tree.
C. black bear.
D. fox.
E. mushroom.
Answer: C
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Homeostasis is maintained using negative feedback loops. Which part of a negative feedback loop detects conditions?
A. response B. effector C. sensor D. integrating center E. stimulus
Which carbon reservoir contains the most carbon?
a. atmosphere
b. biomass on land c. lakes d. oceans e. soil
Fats are major constituents of
a. proteins. b. genes. c. photosynthesis. d. cell membranes. e. all of these.
Below is a list of molecules with different chemical characteristics
Knowing that all molecules will eventually diffuse across a phospholipid bilayer, select the option below that most accurately predicts the relative rates of diffusion of these molecules (fastest to slowest). alanine estrogen propanol sodium (a) alanine > propanol > sodium > estrogen (b) sodium > propanol > alanine > estrogen (c) estrogen > propanol > sodium > alanine (d) estrogen > propanol > alanine > sodium