Amicrobiology instructor prepares cultures for a gram-staining laboratory by inoculating growth medium with a gram-positive coccus (non motile) and a gram-negative rod (motile). the goal is to demonstrate staining of a mixed culture of gram negative and gram positive cells. the flask in incubated at 35 c for 24 hours without aeration or shaking. a sample is stained and reveals only gram-negative rods. both cultures are known facultative anaerobes. give a likely reason for success of the gram-negative rod. assume that the cultures have comparable intrinsic growth rates.

As a result of a labeling mistake at the chemical factory, a farmer accidentally sprays weedkiller rather than fertilizer on half her land. as a result, she loses half of her productive farmland. if the property of diminishing returns applies to all factors of production, she should expect to seea. a decrease in the marginal productivity of her remaining land and an increase in the marginal productivity of her labor. b. an increase in the marginal productivity of her remaining land and an increase in the marginal productivity of her labor. c. an increase in the marginal productivity of her remaining land and a decrease in the marginal productivity of her labor. d. a decrease in the marginal productivity of her remaining land and a decrease in the marginal productivity of her labor.