If the dilution effect is operating within a social group, you would expect that:

Integrative 1 (20 pts. total) While staying up late one night, you watch a YouTube video that features rare animals from the Bornean rainforest. One of the species shown in the video is a small marsupial (mammal with a pouch) that you have never heard of before.  Several different species of figs make up the bulk of this animal’s diet, and individual males fiercely defend trees with within distinct territories.  Females tend to prefer males with the best fig resources; they often mate with a male after assessing the quality of his figs.  Males have striking white coats with huge black spots, whereas females’ coats are dull and brown.  Males also have unusually large floppy ears. a.  What type of mating system (be very specific) would you expect this species to exhibit?  Explain your answer (5 pts.).   b.  Name and describe one process that would, over evolutionary time, cause males’ spots to become more pronounced and males’ ears to become larger and floppier (5 pts.).   c.  When males meet at territory boundaries, they display by head-bobbing at one another.  Describe one factor that would lead both males to escalate their displays to include physical aggression (4 pts.).   d.  Use the gamete order hypothesis to explain why male care is unlikely to occur in this species (6 pts.)   PLEASE LABEL YOUR ANSWERS WITH (a), (b), (c) and (d).

Which of the following is a primary benefit of antipredator vigilance within social groups?

Polyandry tends to be a relatively rare mating system because:

Iron (II) is measured in abandoned mine drainage using a phenanthroline method (Standard Methods for the examination of water and wastewater, method 3500-Fe). In this method 1.00 ml of duplicate water samples are acidified, added to phenanthroline solution and diluted to 100.0 ml. The solution turns deep red and is measured at 510 nm. A series of standards from 0.50-2.00 ug/ml Iron(II) are prepared and their absorbance measured. The data for these solutions is given below. Using this data calculate the concentration of iron(II) in the original mine drainage samples.  

When reporting colony morphology from a MAC, all of the following are reportable characteristics except:

This organism may produce a weak positive catalase test and is PYR positive.

A catalase test is performed on a beta hemolytic Strep. The expected result would be:

Enterobacteriaceae is a single organism.

All of these are considered a hospital acquired infection, except: