Temperature and worm survival are not related.
Animals, such as worms, with favorable traits (like heat tolerance) will survive and pass those traits
on to their offspring.
References
Multiple Choice Natural selection IV Section: 01.02
22.
Award: 10.00 points
Ecosystem examples
Which of the following levels of biological organization is correctly matched with an example?
a herd of bison - community
a spider - organ system
flowers and insects in a garden - organism
a rock garden with various plants and rocks of different sizes - population
a desert with little water, high heat, sand, cacti, and some mammals - ecosystem
A desert is an ecosystem as it involves both the living organisms and the physical environment (soil,
atmosphere, etc.).
References
Multiple Choice Ecosystem
examples
Section: 01.01
23.
Award: 10.00 points
Composition of ecosystems
A biologist is studying how acid rain affects earthworm and beetle populations in a portion of
Yellowstone National Park. What level of organization is she studying?
population
community
ecosystem
biosphere
cells
Ecosystems incorporate both biotic (earthworms and beetles) and abiotic (acid rain) factors.
References
Multiple Choice Composition of
ecosystems
Section: 01.01
24.
Award: 10.00 points
Trophic levels
Didinium are carnivorous protistans that prey on other, slower moving protistans. How should
Didinium be classified?
eukaryotic decomposer
prokaryotic consumer
bacterial decomposer
prokaryotic producer
eukaryotic consumer
Protista are eukaryotes and carnivores are consumers.
References
Multiple Choice Trophic levels Section: 01.01
25.
Award: 10.00 points
Composition of ecosystems II
Sam is studying the interaction between porcupines, pinion pine trees, and pine bark beetles. Over
the course of his study in Colorado, he observes the behaviors of 25 porcupines, records the
location of 151 pinion pines, and traps 332 beetles. How many populations does his study include?
1
3
508
151
There is not enough information to answer the question.
A population is all members of a species in a particular area. There are 3 different species, thus 3
populations. Each individual is an organism so there are a total of 508 organisms.
References
Multiple Choice Composition of
ecosystems II
Section: 01.01
26.
Award: 10.00 points
Composition of ecosystems III
Which of the following is the most inclusive level of organization?
class
population
ecosystem
species
cells
The ecosystem includes both abiotic and biotic factors. Communities and populations include only
the living components. Cells are the building block for all living things.
References
Multiple Choice Composition of
ecosystems III
Section: 01.01
27.
Award: 10.00 points
Trophic levels II
Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in
its web. Later that day, a bird eats the spider. How many consumers has Kevin observed directly in
this scenario?ev: 07_17_2014_QC_51325
0
1
2
3
4
Only organisms that consume other organisms for food (spider, bird) are consumers.
References
Multiple Choice Trophic levels II Section: 01.01
28.
Award: 10.00 points
Trophic levels III
Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in
its web. Later that day, a bird eats the spider. How many producers are there is this scenario?
0
1
2
3
4
Only organisms that produce food (e.g., plants) are producers. None are mentioned in the question.
References
Multiple Choice Trophic levels III Section: 01.01
29.
Award: 10.00 points
Trophic levels IV
Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in
its web. Later that day, a bird eats the spider. How many populations are involved in his study?
0
1
2
3
4
Populations include all members of the same species. This study includes a spider, a cricket, and a
bird, all of which are different species.
References
Multiple Choice Trophic levels IV Section: 01.01