All of the following are general components of the growth factor signaling pathway EXCEPT
A. tyrosine kinase-linked receptor.
B. GRB2-Sos-Ras complexes.
C. phosphorylated transcription factors.
D. Raf-1.
E. IP3 and Ca2+.
E. IP3 and Ca2+.
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Australopiths show a trend toward improved upright walking, smaller teeth, and greater hand dexterity. Like other early hominins, they retained a ____
a. vertically split upper lip b. a skull that opens to the spinal cord at the rear c. modern human sized brain d. chimpanzee-sized brain e. a prehensile tail
Involves aggregated data on the population level. ecologic fallacy
a. ecologic study b. case study c. repressed study d. none of the above
Congenital deafness in humans is due to the
homozygous condition of either of the recessive genes d or e, or both of these genes. Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E__) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: (a) Dd EE x Dd EE (b) Dd Ee x Dd Ee (c) dd EE x DD ee (d) Dd EE x Dd ee (e) Dd EE x DD Ee What will be an ideal response?
Which of the following is not a polymer of numerous monomer units?
A) a phospholipid B) a polypeptide C) an RNA molecule D) cellulose E) starch