A mnemonic for remembering the taxonomic levels from Domain to Species is "Dear King Phillip Came Over for Good Soup." The word "came" here is a reminder of the taxonomic level of ______.
A) class
B) category
C) chain
D) colony
E) culture
Answer: A) class
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The correct sequence of events in the development of chordates is _____
A) cleavage, gastrulation, organogenesis, and then formation of a blastula B) gastrulation, formation of a blastula, cleavage, and then organogenesis C) cleavage, formation of a blastula, gastrulation, and then organogenesis D) gastrulation, organogenesis, formation of a blastula, and then cleavage
Muscle contraction is regulated by:
A. depletion of acetylcholine, which returns the ligand-gated ion channel to the resting, closed conformation, preventing further transport of sodium ions. B. an ATP-powered sodium pump in the plasma membrane that continuously works to set up a sodium concentration gradient. C. an enzyme that degrades and removes acetylcholine from the neuromuscular junction. D. the resting neuron that does not release acetylcholine into the neuromuscular junction. E. All of these choices are correct.
Lamarck's inheritance of acquired characteristics included the idea that
A. species are only produced through special creation. B. local catastrophes cause mass extinctions of species. C. there is a natural force in all living things that pushes them toward perfection. D. species are fixed and unchanging over time.
For a given cross, the expected number of double recombinants is 20 and the observed number of double recombinants is 15. What is the interference calculation (I)?
A) 0.25 B) 1.33 C) 20 D) 0.75 E) 15