Download Midterm 1 Hints and Old Questions and more Study notes Biology in PDF only on Docsity!
Bioe 107 Fall 2018
Hints for answering the questions and sample questions from past tests.
The exam will have 3 parts:
A. Definitions w one example (based on terms/examples) B. Short answer (from study guides) C. Graphs
The number of points you get depends on the completeness of your answers. For instance:
Definition s:
Rain shadow effect: 1 pt: effects of mountain range on regional climate
3.5 pts (full): effects of mountain range on regional climate – mtns force moving air upwards forcing it to cool and release precipation on windward slopes (weather side), resulting in less precip on the leeward side.
Example: pick ONE: Sierras or Santa Cruz mtns, or…..any [no need to explain/elaborate]
Thermoregulation – 1 pt: regulation of body temperature
3.5 pts: ability of organisms to keep body temperature within certain bounds even if surrounding temperatures differ. Example: pick ONE: plants, bees, lizards, mammals, birds….[no need to explain/elaborate]
Short Answers:
- Question: If b increases as N increases, but d remains constant, how will r change? Draw Graph (label everything). [3,2] Answer: r increases
b Rate
d
N
Sample questions D. Definitions Pick 4. Define these terms and give example of each: 3.5 per def + 1.5 ex = 5 pts each =20 total Solar radiation Allometry Acclimation Type I survivorship Thermoregulation Resource partitioning
B. Short Answers (10 pts each). Use bullet points not prose as much as possible. For graphs, label all axes, lines and key intercepts. [NOTE – almost all were from your Study Guide in Terms/Concepts each week]
- How does the loss of ice cover near the North Pole affect a) Earth’s albedo? b) climate change?
- What is the thermoneutral zone? How does it vary between a tropical and polar mammal? Use a graph to show these differences.
- How do ectotherms control body temperature? Discuss these adaptations for a plant or an animal.
- How does optimal foraging behavior vary with food availability? Give/explain an example.
- Explain why extinction risk is higher in small populations. Give/explain an example.
- If b increases as N increases, but d remains constant, how will r change? Draw Graph (label everything).
- Explain the term (K-N) in the logistic population growth equation and then show how this can be expanded in the 2 spp competition equation.
- What is the difference between r, and R 0?
- Calculate and complete this hypothetical life table with l(x), l(x)b(x), and R 0
Draw a loop diagram for the life cycle of this organism.
- What critical set of observations or experimental treatments allow you to distinguish between exploitation and interference competition? Negative density-dependence vs positive density- dependence.
- You are studying competition between red and black ants. For the red ant, K1 = 100 and =2; for the black ant, K2 = 80 and = 2. Suppose the initial population sizes are 10 red ants and 55 black ants: a) Graph the state space and indicate isoclines and intercepts for both species; b) put an X on the graph to locate the initial population sizes (Hint: do the arithmetic to plot intercepts
Age (years) S(x) b(x) 0 500 0 1 400 2. 2 40 3 3 0 0
