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  Adapted from Ito et al. 2003. The Malaysian ant species C. inflata (pictured above) has a bright yellow band across its thorax. When attacked by a predator it secretes a sticky, toxic fluid. A newly described ant in the genus Camponotus also has a bright yellow band across its thorax. Researchers set out to understand the relationship between the two ant species.    They tested newly hatched Malaysian domestic chicken chicks to see what they would eat. Each chick was put through the 5 trials below in this order and their behavior was observed. Trial # Prey presented Chick behavior 1 5 Camponotus ants Ate all 5 readily 2 5 C. inflate ants Attacked and spat out 3 5 C. inflate ants Ignored 4 5 Camponotus ants Ignored 5 5 control ants (not yellow; known to be tasty)  Ate all 5 readily   How would you describe the relationship between the Camponotus and C. inflata ants? (Be as specific as you can with terminology as you describe this relationship.) Briefly explain your reasoning. Researchers observed that in the field the ratio of C. inflata to Camponotus was 189:1 and they only observed Camponotus in areas with C. inflate. If a viral disease came through and killed most of the C. inflata ants, but left the Camponotus alive such that the ratio of the ants was now 1:1, how do you expect this event would affect predation?  on Camponotus? Explain briefly: on C. inflate? Explain briefly:

Short answer questions

It is important to be able to weld out-of-position because weld quality is better on out-of-position welds.

If an overhead weld has porosity and the arc length is correct, increase the shielding gas flow rate.

When an electrode gets contaminated, it must be reground.

What does TIG stand for?

Grind marks should run around the diameter of the electrode.

An electrode is used in GTAW to add metal to the weld bead.

Identify the order of the steps to assemble a GTAW torch.

A technique used at the end of a weld is to reduce the current using the foot pedal.