bio150midterm2001

bio150midterm2001 - 1 BIOLOGY 150 Midterm Exam Winter 2001...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Name___________________________ BIOLOGY 150 Midterm Exam Winter 2001 BEFORE YOU START: WRITE YOUR NAME ON EACH PAGE!!!! Read the questions carefully before answering to ensure that you fully understand what we are looking for. Answer the questions in sufficient detail to let us know that you fully understand the critical issues. Do not use the shotgun approach of throwing everything under the sun into your answer in the hope that something will hit the target because we may deduct points for statements that are counter to the correct answer. Good luck and wow us with your ecological knowledge! PART A. Shorter answers, graphs or calculations. Your answers can be in point form but must be complete. 1. Biomes provide a striking example of a match between organisms and their environment on a broad geographic level. (i) Name two biomes and identify a key feature of each (4 points): Biome Feature (ii) If we were to compare two plants that occur in the same biome, say desert, but each occurs on a different continent, would this comparison be more likely to provide an example of an adaptive radiation or an evolutionary convergence? Explain why. (2 points) 2. Outline the key features aspects that together produce the process of natural selection. Which part is ecological, and why is it ecological? (6 points).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Name___________________________ 3. The photo below shows a clear pattern: a bush surrounded by a bare area of soil with grass and other vegetation growing beyond the bare patch. Describe two different ecological mechanisms that could account for this pattern. Outline experiments you could conduct to test EACH of the two hypothesized mechanisms. For each hypothesis, discuss what result from your experiment would refute the hypothesis and what result would support the hypothesis (8 points). Paste Krebs photo here 4. The cost of inbreeding may favor the evolution of dispersal because individuals that fail to disperse may mate with relatives leading and produce less viable or inviable offspring. Outline an experiment you could do with plants to test for a cost of inbreeding. Be sure to identify any critical assumptions you make, and indicate what result from your experiment would indicate a cost to inbreeding (5 points).
Background image of page 2
3 Name___________________________ 5. Graphical models of optimal foraging provide a nice way to examine the foraging decisions of an animal that is repeatedly making trips between foraging patches and a central place, as exemplified by a bird that forages for food to feed the chicks in its nest. Below is the skeleton of this graphical model which you need to complete (6 points). (i) Label all axis including the two separate parts of the x axis (ii) Draw the foraging intake curve to show prey gathered while foraging in the patch (iii) Then show how to solve for the optimal number of prey items that maximizes the rate of energy returned to the nest
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

bio150midterm2001 - 1 BIOLOGY 150 Midterm Exam Winter 2001...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online