A student wants to develop a model that categorizes various plants and animals as either heterotrophs or autotrophs. Which statement provides the BEST criteria for distinguishing which category the various organisms should be placed within the model?
A
Heterotrophs are multicellular organisms that reproduce sexually, autotrophs are unicellular organisms that reproduce asexually.
B
Heterotrophs can produce their own food from inorganic sources such as carbon dioxide, autotrophs need to consume other organisms in the food chain for sustenance
C
Heterotrophs need to consume other organisms in the food chain for sustenance; autotrophs can produce their own food from inorganic sources such as carbon dioxide
D
Autotrophs are multicellular organisms that reproduce sexually; heterotrophs are unicellular organisms that reproduce asexually.

How does a hydroelectric power plant converts energy into energy.

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.