Sara is 5 ft 4 in. tall and weighs 115 lb. Katy is 5 ft 10 in. tall and weighs 127 lb. They both have a BMI of 18.5. How can they have the same BMI? What is the value of knowing the BMI?
What will be an ideal response?
The BMI evaluates your weight in relationship to your height. It is an indicator of how much body fat a person may have.
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Why does ice float in liquid water?
A) The high surface tension of liquid water keeps the ice on top. B) The ionic bonds between the molecules in ice prevent the ice from sinking. C) Ice always has air bubbles that keep it afloat. D) Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water. E) The crystalline lattice of ice causes it to be denser than liquid water.
When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as
A. isotopes. B. ions. C. isomers. D. unstable atoms.
The purpose of sodium dodecyl sulfate (SDS) in a two-dimensional gel electrophoresis experiment is that it allows proteins to separated by
A. by charge only B. primarily by molecular mass C. by a combination of both size and mass D. net charge
In Paine’s study, the starfish are the top predators in this system and eat each of the other
species mentioned. Whelks eat both mussels and barnacles, while both mussels and barnacles are filter feeders that feed on small particles in the water, including algae and other autotrophs. In terms of the number of organisms, you would expect __________ to have the highest number of individuals
a. mussels b. whelks c. starfish d. both whelks and starfish