Leaves:a
represent a fairly small fraction of the overall metabolic budget for a plant.
b. depend on the roots to supply CO2.
c. are the main photosynthetic organ of most plants.
d. are the main site of water uptake in plants.
e. prevent CO2 and O2 from entering the plant.
c
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Extinction is most likely an example of ____
a. microevolution b. macroevolution c. orthogenesis d. uniformitarianism e. gradualism
What type of inheritance pattern is exhibited by the trait being analyzed in this pedigree?
a. autosomal dominant b. autosomal recessive c. X-linked recessive
Viral proteins can damage host cells by:
a. increasing the rate of fermentation within the host. b. producing endotoxins. c. causing a decline in coordination and increased irritability. d. preventing transcription of viral nucleic acids. e. overwhelming the host cell with a large number of viruses.
What do G-protein coupled, enzyme-linked, and ligand-gated ion channel receptors have in common?
A. They change their conformation when bound to a hormone. B. They open ion channels. C. They bind similar hormones. D. They are all linked to protein kinase activation. E. They associate with a protein bound to GDP or GTP.