In which type of regulation do hormones act on the cells that produce it?
a. classical endocrine signaling
b. neuroendocrine signaling
c. paracrine signaling
d. autocrine signaling
e. pheromone signaling
D
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What feature do the tree, ring, and web of life phylogenetic models share?
a. horizontal gene transfer between prokaryotes b. all species share a single common ancestor c. new species evolve from existing species d. speciation from the exchange of transposons
Some liverworts reproduce asexually by forming tiny balls of tissue called:a
setae. b. fronds. c. gemmae. d. prothalli. e. archegonia.
An organism in a partnership with another such that each profits from their being together.
A) metazoa B) tuberculosis C) anthrax D) symbiote E) none of the above
Transporting a substance against its concentration gradient requires
A. a transporter that is facilitated in its diffusion. B. countertransport with another molecule against its concentration gradient. C. cotransport with another molecule against its concentration gradient. D. a transporter that uses energy. E. a channel that is specific for that substance.