1. Populations review material
* This is only a sample of the information on your test, NOT everything

2. Which of the following organisms has the highest reproductive potential?
dogs
bacteria
elephants
humans

3. The number of wild horses per square kilometer in a prairie is the horse populations
Density.
Size.
Dispersion.
birth rate.

4. The living parts of an environment are called _____________________.
animals
keystone
biotic
abiotic

5. Identify each as density dependent or density independent
Diseases
Stress
Flood  DD DD DI

6. Why do researchers uses methods such as “mark and capture” and “sampling” to count populations?
It is faster, less expensive, and requires less manpower.

7. What is the formula for growth rate?
Deaths – Births = growth rate

8. What is the density of a population of 1200 beetles in a 3 acre forest ?
1200 / 3 = 400 beetles per acre

9. Then what is each relationship?
IF:
Then what is each relationship?
Predator/prey & Parasitism
Mutualism

10. 20+6+7+8+3+10= 54 54/6 = 9 avg. per square 9 x 30 squares = 270 robins
Find the number of robins in the forest using the random sampling method. Samples have been taken for you. Show your work. 20 6 7 8 3 10
= 54
54/6 = 9 avg. per square
9 x 30 squares = 270 robins

11. What specific thing does this graph represent?
Exponential growth

12. Arrangement of a population in an area is called _________________.
dispersion

13. The maximum population an ecosystem can support indefinitely is its ________________.
Carrying capacity

14. A relationship in which two organisms live in close association, such as mutualism and commensalism, is called ____________________.
symbiosis

15. Which of the following is one of the main properties used to describe a population?
number of individuals
number of species
color of individuals
kind of adaptations

16. YOU need to be able to construct a predator/prey graph like the wolf and deer one you did in class.