Environmental Science Chapter 8 Test
Which of the following is not an example of a parasite: a cow in a pasture, a tick on a cat, a roundworm in a human's intestine, or mistletoe on a tree
A cow in a pasture
What is the difference between a predator and a parasite is that a predator?
A predator usually kills and eats its prey.
Choose the example of a population: All trees in a forest, all animals in a forest, all maple tress in a forest, or all plants in a forest
All maple trees in a forest
The relationship between acacia trees and the ants that live on them is an example of what?
Mutualism
A population has what kind of growth rate when when the death rate is higher than the birth rate?
Negative
What includes an organisms physical home, the environment factors for survival & all its interactions with organisms.
Niche
Which of the following is one of the main properties used to describe a population: Number of individuals, number of species, color of individuals, or the kind of adaptations
Number of individuals
A liver fluke is a(n) _________ that harms its host as it obtains food.
Parasite
The relationship between a Canadian lynx and a snowshoe hare is an example of what?
Predator and prey
Which of the following is not an example of exponential growth? Reindeer after eating most of the lichens, a bank account that earns interest, increase in rabbit pop. after being introduced to Australia, or mold appearing on bread overnight
Reindeer after eating most of the lichens
Which of the following has the greatest effect on reproductive potential? Producing more offspring at a time, reproducing more often, having a longer life span, or reproducing earlier in life
Reproducing earlier in life
The maximum number of offspring that each member of a population can produce is the population's _________.
Reproductive potential
Which of the following populations has a random dispersion? Solitary snakes in a desert, pine trees in a pine forest, herd of bison, or a flock of flamingoes
Solitary snakes in a desert
What is the carrying capacity of an environment for a particular species at a particular time determined by?
Supply of the most limited resources
A relationship with 2 organisms that live in close association, mutualism and commensalism, is called what?
Symbiosis
Which of the following statements is not correct: Coyotes & foxes compete because they feed on the same kinds of animals, symbiosis is a relationship in which 2 organisms live apart, mutualism is a type of symbiosis, or yucca moths and yucca plants have a symbiotic relationship
Symbiosis is a relationship in which 2 organisms live apart
Members of a species compete indirectly for resources by competing for _________ and for dominance.
Territory
A female dog's niche includes all of the following except: Fleas that infest the dog, the number of puppies the dog has, the neighbor's enclosed yard, or how the dog protects its owners
The neighbors enclosed yard
What is density?
The number of individuals per unit area
Which explains why the growth of orchids on high branches of tropical trees is commensalism: The trees are neither benefited nor harmed, the orchids keep parasites away, the orchids draw nourishment from the trees, or the trees receive nutrients from the orchids
The trees are neither benefited nor harmed
Thick fur on deer is not an example of coevolution. Why?
Thick fur evolves in response to a cold climate
Which of the following would most likely cause a large number of density-independent deaths in a population? Disease-carrying insects, limited resources, predators, or winter storms
Winter storms
Which statement best describes exponential growth?
Within a few years the population increases dramatically.
Which of the following statements is correct: Habitat and niche are the same thing, organism's niche is only part of its habitat that it eats, an organism's niche is outside its habitat, or an organism's habitat is a location
An organism's habitat is a location
Which of the following organisms has the highest reproductive potential? Dogs, bacteria, elephants, or human
Bacteria
Competition for food cannot occur: Among populations whose niches overlap, between animals from two different ecosystems, among members of the same population, or between two populations
Between animals from two different ecosystems and among members of the same population
The _________ of an ecosystem for a particular species is the max population that the ecosystem can support
Carrying capacity
Over a long period of time, 2 species develop adaptations that increase benefits of their relations what is this an example of?
Coevolution
A robin that does not affect the tree in which it nests is an example of ___.
Commensalism
In which of the following relationships is neither species harmed? Parasitism, predation, commenalism, or competition
Commensalism
A population's _________ is the number of its members per unit area or per volume.
Density
The number of wild horses per square kilometer in a prairie is the horses populations_________
Density
A population's ________ is usually described as even, clumped, or random?
Dispersion
A pair of mice finds a place to live with plenty of food & no predators, the mice will have_________growth
Exponential
If two species use the same food source at different times, they are ________ competitors.
Indirect
Unlike a predator in relation to its prey, a parasite does not usually _________ its host.
Kill and eat
The amount of food available for wolves in an area is a _________ resource for wolves.
Limiting
A true statement about parasitism is that parasites:
May cause their hosts to become more vulnerable to predators
