Growing up, darwin saw that farm animals with preferred traits were chosen for breeding. those chosen animals usually produced offspring with the preferred traits. this best illustrates the process of
a. natural selection.
b. evolution.
c. artificial selection.
d. genetic engineering.

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste.the percentage of food that the united states wastes each year is %.

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

How many types of rock can form from the rock cycle