Learned behavior that causes a family of baby ducks to follow their mother is called
A. motivation.
B. operant conditioning.
C. insight learning.
D. imprinting.
E. extinction.
Answer: D
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One of the science-related concerns associated with the use of genetically modified (GM) foods is that
A) overreliance on GM crops may lead to genetic uniformity. B) GM foods are not natural. C) genetic modification degrades the nutritional value of food crops. D) buffer zones of GM crops halt the pollination of non-GM crops.
Tall corn plants (T) are dominant to dwarf plants (tt). Solid green leaves (G) are dominant to leaves with a white tip (gg). A cross between two corn plants yielded the following phenotypes: 51 tall plants with a white tip on their leaves; 43 dwarf plants with solid leaves; 48 dwarf plants with white tips on their leaves; 45 tall plants with solid leaves. What are the genotypes of the parents
that produced these plants? a. TtGg x TtGg b. TtGg x Ttgg c. ttGG x TTgg d. TtGg x ttgg e. None of the above
Histamine
a. causes blood vessels to contract. b. causes capillaries to lose their permeability. c. causes an outward flow of fluids from the capillaries. d. reduces tissue swelling. e. enhances the function of cytokines.
Which one of the following is NOT a zoonosis?
A) cat-scratch disease B) Hantavirus pulmonary syndrome C) rabies D) tapeworm E) All of these are zoonoses.