Populations and Interactions 2

Please consult your notes and texts to help with this test.
Please do not work with anyone else on any of the questions.

Please enter your Full Name:
Your Email Address:
Your Biology Group

1: What term describes the upper limit to the population size that an environment can sustain?: Founder population
Metapopulation
Log phase population
Climax community
Sere
Carrying capacity
2: The gradual, directional change in a community over time is called
3: A high BOD (Biological Oxygen Demand) suggests: Low levels of organic pollution
Low levels of oxygen in the water
An acidic water body
Cold water pollution
High levels of organic matter entering the water
Low levels of oxygen in the water
4: Examine the diagram below. Which phase is the lag phase?: a)
b)
c)
d)
5: Complete this sentence: It is during the _________ phase that the population grows very rapidly
6: At which phase is competition likely to be least significant on the individuals within the population: a)
b)
c)
d)
7: A water body that contains high levels of nitrate is termed: Oligotrophic
Ombotrophic
Eutrophic
Halotrophic
Saprophitic
8: The development of a community in an area where woodland is felled is termed: Primary succession
Invasion
Competitive displacement
Secondary succession
Climax community
9: Examine the picture below. The practice of choppingoff branches from trees at near head level (as in picture b) is termed: Pollarding
Coppicing
Clearfelling
Selective cutting
Heeling in
10: the practice of harvesting from near the base of the trunk, (as in picture a) is termed: Pollarding
Coppicing
Clearfelling
Selective cutting
Heeling in
11: Which term describes a feature of the envronment that stops a population from increasing?: Carrying capacity
Limiting factor
Interference
Parasitism
Asymmetric competition
12: Examine the graph below showing the effect of one Paramecium species on another. The graphs illustrates what ecological phenomena?: Succession
Intraspeific competition
Predation
Parasitism
Interspecific competition
Symbiosis
13: Which is competitively dominant?: P. aurelia
P. caudata
Neither
14: Which of the following statements is true?: There niches overlap completely
The two species cannot coexist
There is considerable niche overlap
In the wild they are likely to have identical distributions
P. auralia is a poor interspecific competitor
15: The diagram below is of common species of barnacle. Which of the following can exist highest up the shore?: Balanus balanoides
Chthamalus stellatus
Either- its down to who got there first
16: Examine the series of diagrams below: What is the name of the process being shown?
17: What are the main nutrients responsible for the process?: Sodium and nitrate
Sodium and phosphate
Phosphate and magnesium
Magnesium and nitrate
Nitrate and sodium
Phosphate and nitrate
18: The process leads to which of the following: High O₂ levels
High diversity
Low primary productivity
High BOD
High light levels
19: What technique would you use if you did not wish to sample a habitat in a random way but wished to sample in a continuous way along an environmental gradient?: Quadrat
Point quadrat
Quadrant
Interrupted transect
Belt transect
20: The graph below shows the population cycles of the snowshoe hare and lynx. Which statement is correct?: The two populations rise and fall together
As the lynx population falls the snowshoe hare population falls
As the lynx population increases the hare population falls
The hare population falls as the lynx population falls
The two populations are unlinked
21: Lynx are: Primary consumers
Secondary consumers
Herbivores
Producers
Symbionts
22: Why are Chthamalus stellatus barnacles not found in mid-tidal areas of beach?: They are competetively displaced by Balanus balanoides barnacles
The mid tidal region is outside of their niche
They are completely predated by Nucellus
They cannot tolerate the immersion regime
It cannot compete with the algae in mid-tidal areas of the beach
23: On a sand dune you can observe the early, middle and late stages of succession simultaneously. Where are the least nutrients available?: Fore dune
Yellow dune
Grey dune
Dune slack
24: Which species is most involved in stabilising the sand?: Bird's Foot Trefoil Lotus corniculatus
Sea Couch Grass Agropyron junceiforme
Sea Holly Eryngium maritimum
Rest harrow Ononis repens
Marram grass Ammophila arenaria
25: What word best describes the type of succession seen on an area of bare sand?