Which of the following best describes how the random sampling method works to estimate population size? An area is broken up into small plots to facilitate counting all organisms living in the entire area.
One line within an area is counted with random units to create a proportion of highly mobile animals.
A complete count of random units of known size within a larger area are used as a representative of the larger area's density to estimate total population size.
Organisms are caught and place into random quadrats to evenly distribute the population.

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)