A woman goes to the doctor and is diagnosed as having rheumatoid arthritis. What factors led to her development of this disease? Select all correct choices
A. Some of her T cells were not positively
selected.
B. Some of her T cells were not negatively
selected.
C. Some of her T cells are recognizing and
responding to her normal self antigens.
D. Some of her T cells are not recognizing
and associating with her MHC proteins.
B,C
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The work of Reznick and Endler with guppies
shows all of the following EXCEPT that a. life history traits can be inherited. b. life history traits evolve. c. life history traits can be altered over a short period of time. d. predation does not influence the modification of life history traits. e. life history traits are coded for in DNA.
Induced pluripotency is a term related to ___
A. producing stem cells from normal body cells B. cloning animals like Dolly the sheep C. the discovery of mutated genes that cause disease D. the decoding of the human genome E. the practice of eugenics
Recently, the bones (not fossils) of a possible new species of humans (in the genus Homo) have been found on an island in Indonesia (an island nation southeast of Asia)
Using radiometric dating, scientists can show that these people were alive as recently as 17,000 years ago. According to the information in this chapter, why do you think they probably used tools?
All of the following are characteristics of vertebrates EXCEPT
A. postanal tails. B. vertebral columns. C. internal organs. D. exoskeletons. E. skulls.