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Populations review material

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Presentation on theme: "Populations review material"— Presentation transcript:

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.


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