Biology Ecology Paper

Topics: Food chain, Trophic level, Population Pages: 6 (1825 words) Published: October 31, 2014

Name: _______________________
IB DP Biology: Ecology Test – Paper 1
40 Points
45 Minutes
1.Which phylum does the plant below belong to?

A.AngiospermophytaB.BryophytaC.ConiferophytaD.Filicinophyta2.What is a community composed of? A.Habitats
B.Populations
C.Abiotic factors
D.Biotic and abiotic factors
3.Which of the following is the best definition of a population? A.A group of individuals that can interbreed and produce fertile offspring B.The number of individuals of the same species in a given area C.A group of species living and interacting with each other in a given area D.The total number of individuals in a given area

4.The graph below represents a sigmoid (S-shaped) population growth curve. Three sections of the curve are indicated (1, 2 and 3). In which of the sections is natality plus immigration greater than mortality plus emigration?

A.1 only
B.2 only
C.1 and 2 only
D.3 only
5.Two different trees have been classified as Pinus pinea and Pinus nigra. Which of the following statements is correct? A.Both trees belong to the same class but a different genus. B.Both trees belong to the same family and same genus.

C.The species name of both trees is Pinus.
D.The family names are pinea and nigra.
6.A collection of four animal specimens is observed and a dichotomous key is applied. Which specimen is an arthropod? 1.Non-segmented body.........................................go to 2Segmented body.................................................go to 3 2.Body is not symmetrical.....................................specimen ABody is symmetrical...........................................specimen B 3.Jointed appendages present................................specimen CJointed appendages absent.................................specimen D A.Specimen A

B.Specimen B
C.Specimen C
D.Specimen D
7.Which of the following ecological units includes abiotic factors? A.A community
B.An ecosystem
C.A population
D.A trophic level
8.In the forest zone between Gabon and the Republic of Congo it is estimated that an epidemic of the Zaire strain of the Ebola virus (ZEBOV) killed nearly 5000 gorillas, significantly reducing the population. Which statement is supported by this information? A.Natality was greater than mortality.

B.Mortality was equal to natality.
C.Natality and immigration was greater than mortality and emigration. D.Mortality was greater than immigration and natality.
9.If humans become infected with the Ebola virus it can have devastating effects. Strong, but not certain, evidence suggests that trading in animal products is the main reason for the spread of the Ebola virus to humans. Which statement about the precautionary principle is correct? A.In the absence of certainty about cause and effect, people should not be asked to stop trading in animal products. B.The burden of proof regarding a cause and effect relationship lies with scientists. C.Because it is a probable cause, trading in animal products should be banned because of the potentially devastating consequences. D.The precautionary principle is not relevant in this case.

10.Which group of organisms in the carbon cycle converts carbon into a form that is available to primary consumers? A.Decomposers
B.SaprotrophsC.Detritus feeders
D.Producers
11.Which of the following are greenhouse gases?
I.Oxides of nitrogen
II.Carbon dioxide
III.Methane
A.I and II only
B.I and III only
C.II and III only
D.I, II and III
12.Which diagram shows the flow of energy through a community with three trophic levels?

13.The diagram below shows a simplified food web.

What is the role of the snake in this food web?
A.Primary consumer
B.Secondary consumer
C.Tertiary consumer
D.Producer
14.What is a community?
A.A group of organisms living and interacting in the same trophic level B.A group of populations living and interacting in a food chain C.A group of organisms of the same species living and interacting in an ecosystem D.A group of...
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