Which of the following represents an example of true navigation?

“Dead zones” are large regions of water (e.g., in the gulf of Mexico) where many fish and other aquatic organisms are unable to survive. What is responsible for these dead zones?

Species “E” is eaten by species “B” and “D” and typically makes them sick. Which species is most likely to benefit from being a mimic of “E”? Screenshot_2020-04-07 Microsoft Word – exam4Bbversion 2 docx – exam4Bbversion 2 pdf_15_.png

Beavers and elk compete for food such as aspen and willow trees. What impact would removal of beavers from an environment have on the carrying capacity of elk?

Students who take this exam are expecrted to NOT engage in any form of academic dishonesty.  This includes using information from any outside resources such as textbook, internet, and others.  You are, however, allowed one side of one-half of a standard 8.5 x 11 piece of paper with HAND-WRITTEN notes.  Indicate your willingness to NOT engage in academic dishonesty by indicating your response below.  Note: you must choose option “a” in order to receive credit for this exam.

Consider the exponential population growth curve of dandelions shown here. True or false.  Each individual dandelion is producing more seeds after three months than after one month. Screenshot_2020-04-07 Microsoft Word – exam4Bbversion 2 docx – exam4Bbversion 2 pdf_31_.png

Which of the following is a true statement regarding the two communities below. The information provided below may be useful as you answer this question. Screen Shot 2022-05-03 at 4.09.45 PM.png

Consider the seasonal turnover that occurs in many lakes around this region. Beginning with the current time of year (i.e., spring- the sun is melting the ice on lakes) place the following events in the correct sequence. 1-Surface water warms to 4C and sinks. 2-Surface water cools to 4C in the fall and sinks. 3-Water mixes and spring turnover occurs. 4-Cooler water settles near the bottom while warm water is found near the surface throughout the summer. 5-Ice forms at surface and water is warmer with increasing depth. 6-Water mixes and fall turnover occurs.

Indicate whether the population of fish represented by the following data set is growing, stable, or declining.  “Age Class” represents individuals at a specific age.  “Survivorship” is the proportion of individuals that survive to a particular age.  “Age-Specific Fecundity” represents the average number of offspring produced by each female.  The fourth column- “Average Births/Year/Original Female” is the product of “Survivorship” and “Age-Specific Fecundity.  The sum of the numbers in the fourth column is a measure of net reproductive rate. Screen Shot 2022-05-03 at 4.31.57 PM.png

Which of the following graphs shown here illustrates data that are consistent with the optimal foraging theory? The “X” axis in each represents distance from the nest that birds travel to find food. The “Y” axis in each represents the amount of food that birds carry back to the nest. Screenshot_2020-04-07 Microsoft Word – exam4Bbversion 2 docx – exam4Bbversion 2 pdf_12_.png