There are several species of grain beetles that live on dry meal and do considerable damage to stored grain. in an experiment, a dozen jars of dry meal are set up and fifty individuals of each species, both males and females, are added to each jar. the food supply is not quite sufficient to last for six months and the size of the jar is adequate so that wastes do not become toxic. most likely, examination of the jars in six months will find:

What are the characteristics of living things

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.