When assembling a fish aquarium one must add a conditioner to the water that contains bacteria capable of metabolizing fish waste such as ammonia, nitrate, and nitrite that accumulates in the aquaria water. Which of the following components of signal reception and transduction is NOT required for the bacterial two-component regulatory system for metabolizing these nitrogenous waste products?
A. NarQ receptor
B. NarL transcriptional activator
C. a protein kinase
D. metabolic enzymes
E. ligand-gated calcium channel
E. ligand-gated calcium channel
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A good sampling method for quantifying the density of birds or bats is the use of
A. line transects. B. quadrats. C. pitfall traps. D. baited live traps. E. mist nets.
A method called _____ uses diagrams to group species based on their shared characteristics
a. taxonomy b. cladistics c. phylogeny d. comparative morphology e. exaptation
If a researcher wishes to clone a gene using typical restriction endonucleases, how does the restriction endonuclease recognize genes in the genome?
What will be an ideal response?
The formation of the lens of the vertebrate eye from a skin layer in contact with an outgrowth of the embryonic brain is an example of
A. cellular aggregation. B. morphogenesis. C. neurulation. D. induction. E. gastrulation.