A patient with severe COPD is observed in the body position shown below. What is the physiological rationale for why this position reduces the work of breathing?

Define the term “adaptive radiation” AND, using one of the four parts of the molluscan body plan, describe an example of how adaptive radiation is seen in molluscs by comparing two mollusc groups of your choice.

Cephalization is the concentration of sense organs at the posterior end of an organism

Station K Answer both questions below: Identify the indicated STRUCTURE A. What is the FUNCTION of structure B?

Station M Answer the question below: You encounter an unfamiliar critter while doing field work. You immediately pull out your pocket dichotomous key that you carry with you everywhere, waiting for this exact moment. The mystery critter has functional membranous hindwings which are concealed by its thickened forewings. Based on your arthropod expertise, you can tell that the abdomen bears forceps-like cerci. Upon closer inspection, you note that while this critter has hindwings that are modified, the forewings are hard and leathery. What clade does this arthropod belong to?

Fill in the blanks in the table below (0.25 points each) Clade Organism Metamorphosis [1] Beetles [2] Diptera [3] Holometabolous Hemiptera True bugs [4] Hymenoptera [5] Holometabolous [6] Butterflies, moths [7] [8] Grasshoppers, crickets, katydids Hemimetabolous

Match the letters in the phylogeny below to the correct terms in the word bank provided. Not all terms will be used. (0.5 points each).

Name TWO of the three characteristics common to all arthropods and DESCRIBE how they contribute to arthropod success on land.

In your own words explain slope.

Which of the following is a primary reason humans need sleep?