Suppose you are examining the processes of muscle contraction in fishes. What type of study is this an example of?
a. an ecological study
b. an anatomical study
c. a taxonomic study
d. a physiological study
Ans: d. a physiological study
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In which plant cell or tissue would the pressure component of water potential most often be negative?
A) leaf mesophyll cell B) stem xylem C) stem phloem D) root cortex cell E) root epidermis
Younger honeybees have higher levels of juvenile hormone
a. True b. False
Once glucose has entered a cell, what prevents it from diffusing back out of the cell?
a. Glucose pumps actively transported any leaked glucose back into the cell. b. One side of the cell membrane is permeable to glucose, but the other side is not. c. Glucose inhibitors attach to glucose once it’s in the cell. d. Glucose is phosphorylated, preventing it from leaving the cell. e. Glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction.
Low density lipoproteins
a. carry cholesterol to the liver. b. line the artery walls. c. are used for nutrition. d. lower blood pressure. e. carry cholesterol and other fats to body cells.