Download Chapter 8 Test Study Guide

Chapter 8 Test Study Guide
NOTE: You should also study your notes, vocabulary words, and the textbook.
Name: ___________________________
Class: _________ Date: _____________
1.
What is the difference between a predator and a parasite? __________________________________________________________
2.
The number of loblolly pines per square mile in Chambers county Alabama would be the loblolly pine’s _______________________
3.
Which one of the following characteristics best describe a population?
A. Number of individuals
B. Color variations among organisms C. Unique adaptations
D. Number of species
4.
The carrying capacity of an environment for a particular species at a particular time is determined by the supply of _____________
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5.
Clumped, random, or even typically describes the __________________________________ of a population.
6.
What determines an organisms reproductive potential? Give an example of an organism with a high reproductive potential.
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7.
Define population density. _____________________________________________________________________________________
8.
The acute eyesight of a red tailed hawk is not an example of coevolution. Why? __________________________________________
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9.
The relationship between a Canadian lynx and a snowshoe hare is an example of _________________________________________
10. A species of insect has exponential growth after it is introduced into an area where it has never lived. Which statement best
describes exponential growth?
A. The population increases and then immediately decreases
B. Within a few years the population increases dramatically
C. The species’ reproductive potential increases over time
D. Each individual mutates within 10 years
11. Two species using the same food source at different times is an example of indirect _____________________.
12. A species’ niche includes that species’ _________________________, _______________________, and _____________________.
13. The maximum population that the ecosystem can support indefinitely is known as _____________________________.
14. The interaction between a cheetah and gazelle is _______________________________.
15. A microscopic organism that lives in the gut of a cow helps break down grass and hay so the cow can use it for food. The organism
lives inside the cow. What kind of relationship is this? _______________________________________________________________
16. The relationship between some species of trees and ants can best be described as ______________________________________.
17. Which statement(s) is/are true about parasitism:
A. Parasites immediately kill their host
C. Parasites are always animals and never plants
18. Competition for food can occur:
A. Between two populations
C. Among populations whose niches overlap
B. Parasites do not live on or in their hosts’ body
D. Parasites may cause their hosts to become more vulnerable to
predators
B. Among members of the same population
D. Between animals from two different ecosystems
19. Which of the following is an/are example(s) of exponential growth?
A. Mold appearing on bread overnight
B. Reindeer of the Pribilof Islands after eating most of the lichens
C. A bank account that earns interest
D. Rabbit populations after being introduced to Australia
20. Which of the following is not an example of a population?
A. All trees in a forest
B. All plants in a forest
C. All loblolly pines in a forest
D. All animals in a forest
21. Which of the following are parasites?
A. A roundworm in a human’s intestines
C. A tick on a cat
B. A cow in a pasture
D. Mistletoe on a tree
22. Which of the following would most likely exhibit a random dispersion?
A. Gaggle of geese
B. Loblolly pines in a forest
C. Heard of wild horses
D. Solitary badgers in Scandinavia
23. Which of the following would most likely cause a large number of density-independent deaths in a population?
A. Mosquitoes in Kenya
B. African lions
C. Limited resources
D. Hurricanes and Tornadoes
24. What are the three main properties used to describe a population? ___________________________________________________
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25. A(n) _______________________ usually kills its prey while a ______________________ usually only weakens its host.
26. If a mating pair of rabbits find a place to live with plenty of food and no predators, the population of rabbits will probably undergo
______________________________ growth.
27. What is the formula used to calculate a population’s growth rate? _____________________________________________________
28. How do organisms affect each other if they are in competition? _______________________________________________________
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29. List three density dependent factors that will cause a population to decrease. ____________________________________________
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30. A female dog’s niche includes which of the following?
A. The number of puppies the dog has.
C. The neighbor’s enclosed yard.
B. How the dog protects its owner.
D. Fleas that infest the dog.
31. Which of the following statements explains why the growth of orchids on the high branches of tropical trees is an example of
commensalism?
A. The trees receive nutrients from the orchids.
B. The trees are neither benefited nor harmed.
C. The orchids draw nourishment from the trees.
D. The orchids keep parasites away.
32. Name the relationship in which neither species is harmed. _____________________________________________
Essay/short answer
The cardon and organ-pipe are flowering cacti that depend on bats for pollination. The bats pollinate the cacti as they eat the
nectar in cacti’s flowers and spread seeds when they eat the cactus fruit. Studies of the cacti show that they are not producing as
much fruit as they could. If was also noted that bats living near these cacti had been driven from their cave homes by local villagers.
What is the relationship between the bats and the cacti? How did the reduction in the number of bats affect the cacti?
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