Which of the following is not a common system for generating knock-out organisms?
A) transformation B) cre-lox
C) homologous recombination D) CRSPR-CAS
Answer: A
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The mitotic cell cycle results in the production of ________
A) four cells, each with the same amount of genetic material and the same genetic information B) two cells, each with the same amount of genetic material but with different genetic information C) two cells, each with the same amount of genetic material and the same genetic information D) four cells, each with the same amount of genetic material but with different genetic information
Male fruit flies perform a complex mating dance that includes following the female, vibrating a wing to produce a species-specific song, and picking up chemosensory cues by tapping with the legs and licking with the tongue. What physiological features are likely important for causing this behavior? (Check all that apply.)A) Adaptive value of successful matingB) Brain circuitsC) HormonesD) Natural selectionE) Performance of phylogenetically-related speciesF) Sensory neurons on the legs and tongueG) Sperm competitionH) Threats of predation during the performanceJ) Visual systemK) Wings and wing muscles
What will be an ideal response?
Goblet cell hyperplasia is associated with asthma. Based on their function, what is the likely outcome of an overabundance of goblet cells?
A. Excess O2 absorption B. Decreased mucus production C. Excess mucus production D. Decreased CO2 absorption
Two species of spiny anteaters (echidnas) and the duck-billed platypus are the only known living members of which of the following mammalian lineages?
a. Strepsirhini b. monotremes c. Rodentia d. Haplorhini e. marsupials