If an organism's chromosomal DNA is like an instruction manual, what instructions do cells receive from genes?
A) continue growing until the cell can reproduce
B) convert carbohydrates into enzymes
C) make specific proteins from amino acids
D) modify the cell shape for a changing environment
Ans: make specific proteins from amino acids
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A biologist draws a tree of life having only three branches. Which of the following groups did the biologist most likely choose for her diagram?
A. fungi, eukarya, and vertebrates B. archaea, bacteria, and eukarya C. vertebrates, bacteria, and archaea D. bacteria, fungi, and archaea E. eukarya, bacteria, and fungi
Which structure regulates the movement of food into the stomach, and which regulates the passage of food into the small intestine?
a. pyloric sphincter; anal sphincter b. gastroesophageal sphincter; pyloric sphincter c. epiglottis; pyloric sphincter d. epiglottis; gastroesophageal sphincter
Why are conifers and cycads considered gymnosperms?
A. The pollen is wind-dispersed. B. The fruit is not fleshy. C. Pollination and fertilization occur at different times. D. The female gametophyte is not completely enclosed in sporophyte tissue at the time of pollination. E. They have true vascular tissue but do not form seeds.
A limit-violating prediction is a predicted value that:
A. is measured with noise. B. is heteroscedastic. C. does not fall within that variables limits. D. only is normally distributed in the limit.