When a cell is placed in an isotonic solution, water molecules will cross the cell membrane.
A) True
B) False
A) True
Feedback: Water molecules are crossing the cell membrane in both directions with equal frequency
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At the level of the organism, how is osmoregulation achieved?
A. by the movement of solutes across membranes B. by balancing the input and output of water and electrolytes C. by changing the overall permeability of membranes D. by bringing water in through the skin E. None of these choices accurately describe how osmoregulation is achieved at the level of the organism.
Chemoautotrophs oxidize which of the following to obtain the energy necessary to reduce carbon dioxide to an organic compound?
A. ammonia B. hydrogen sulfide C. hydrogen gas D. nitrites E. All of the above.
Digests carbohydrates in the mouth
Suppose you have the following regression results from a regression of home prices on house attributes for a random sample of house transactions: CoefficientsStandard ErrorIntercept16310.04114.5Number of Bedrooms7295.31399.9Number of Bathrooms23473.04032.0r-squared = 0.302 Adjusted r-squared = 0.299If we assume that the proper model to predict the market value of houses is given by this regression, and thus we are getting unbiased estimates of the true relationships between number of bedrooms/bathrooms and sales price, what is the effect on sales price of increasing the number of bathrooms in a house by one, holding number of bedrooms fixed?
A. Approximately, $16,310 dollars. B. Approximately, an increase of 30%. C. Approximately, $ 7,295 + 23,473 = $30,768. D. Approximately, $23,473.