Which is a symptom of a transmissible spongiform encephalopathy (TSE)?
a. influenza-like symptoms
b. progressive immune deficiency
c. degeneration of the digestive tract
d. inflammation of the reproductive organs
e. degeneration of the brain and central nervous system
e
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Which of the following is TRUE of fate mapping?
A. It determines the ultimate structure/function of a particular cell type during embryonic development. B. It maps the genes of an embryo. C. It assesses the quality of a developing embryo. D. It maps the proteins within a morphogenic field. E. It determines hereditable disorders in the embryo.
Mycorrhizae, present for most plant species, generally help roots with the uptake of all EXCEPT
a. water. b. nitrogen. c. phosphate. d. carbon. e. sugars.
Many invertebrates have separate and differentiated receptors for taste and smell, while others have a
single receptor for both.
Indicate whether the statement is true or false.Progressive changes in the fossil record are evidence for evolution because
A. they show gaps in the fossil record. B. they show descent with modification. C. they show inheritance of acquired characteristics. D. they show evolutionary change at the level of the individual.