Genetic traits that enhance survival tend to be passed from generation to generation. In the case of Colias eurytheme larvae, green larvae are camouflaged, and yellow larvae are easily spotted by predators. Over generations, you would expect:
A. the number of yellow larvae to increase,
thus increasing the presence of the yellow
gene in the population
B. yellow larvae to decrease in numbers
C. green larvae to be selected against
D. both yellow and green larvae to develop a
thicker skin so they are not as attractive to
predators
B
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Which type of tissue, in the circulatory system, is involved in regulating airflow to alveoli?
A. connective B. epithelial C. smooth muscle D. nervous E. vascular
The resting potential across a typical neuron
membrane is approximately ____ inside relative to outside. a. ?70 microvolts b. ?70 millivolts c. ?70 volts d. +70 millivolts e. +70 megavolts
Bacteria in the genus Salmonella are frequent causes of serious food contamination. Which of the following methods would provide rapid confirmation that a Salmonella species was a contaminant in food suspected of causing food "poisoning"?
A) phage typing B) biochemical tests C) physical characteristics D) analysis of nucleic acids E) serological tests
It's the ninth inning, and the bases are loaded. As the pitcher winds up to throw the ball, how does each tissue in his arm contribute to this critical pitch? The ________ of his fingers grips the ball. His ________ sends instructions that trigger his ________ to contract. His ________ provides stability and transmits the force produced.
A. epithelium; ectoderm; mesoderm; endoderm B. ectoderm; ectoderm; mesoderm; endoderm C. connective tissue; nerve tissue; muscle tissue; epithelial tissue D. epithelial tissue; nerve tissue; muscle tissue; connective tissue