Which of the following is a defining feature of vertebrate nervous system development?
a. Oraganogenesis
b. Ectoderm develops into organs
c. Ectoderm and endoderm develop into organs
d. Ectoderm, endoderm and mesoderm develop into organs
e. Neural crest
E
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The only group of oxygenic phototrophic bacteria are the
A) green nonsulfur bacteria. B) Chloroflexi. C) Cyanobacteria. D) Chlorobi.
After a steroid hormone binds its receptor, the hormone-receptor complex then:a
activates a G protein. b. activates a protein kinase. c. activates adenylyl cyclase. d. activates calmodulin. e. binds DNA.
When the mammalian brain compares the actual temperature of the body to the preferred temperature of the body, which general component is being used?
A) sensor B) effector C) integrator
Which of the following bacterial RNA polymerase subunits is found in the holoenzyme, but not the core enzyme?
A) ? (sigma) B) ? (omega) C) ? (beta) D) ?? (beta prime) E) ? (alpha)