Chapter 21 Practice Test
Name_____________________________________
1. An example of mimicry that is important in anti-predator defenses is when
A. a harmless species resembles a dangerous species
B. two harmless species look similar
C. a species resembles an inedible object
D. one individual used bright colors to warm others of danger
2. One difference between predators and parasites is that parasites
A. feed only on the inside of other organisms
B. are always microorganisms
C. usually do not cause the immediate death of the organism they feed on
D. are not anatomically or physiologically specialized
3. Magpies and crows are scavenger birds that feed on the same food
sources and cannot live in the same community. This is an example of
A. character displacement
B. symbiosis
C. resource partitioning
D. competitive exclusion
4. A change in anatomy that results when two species compete for the same
resource is called
A. mutualism
B. character displacement
C. competitive exclusion
D. resource partitioning
5. A symbiotic relationship in which one species benefits and the other is not
affect is called
A. commensalisms
B. mutualism
C. parasitism
D. competition
6. Which of these is an ectoparasite?
A. tapeworm
B. malaria
C. deer tick
D. lion
7. Which of these is considered a secondary compound?

A. thorns
B. spines
C. sugar
D. nicotine
8. A clown fish and an anemone would show what kind of relationship?
9. A king snake and a coral snake have what kind of relationship?
10.Pollination is what kind of relationship?
11.How is predation different from parasitism?
12.What are two ways to lessen competition?
13. Imagine a shark with a remora attached to it. The shark is not bothered by
the remora and the remora gets a free ride and leftovers from the sharks’ meals.
What type of relationship is this? What type of relationship would it be if the
remora suddenly began to clean the sharks’ skin regularly instead of just hitching
a ride?