Environmental Science Chapter 8
The number of wild horses per square kilometer in a prairie is the horse populations __________________.
Density
What are the main properties used to describe a population?
Density, Dispersion, growth rate
Thick fur on deer is not an example of coevolution. Why?
It developed due to environmental factors, not due to an organism.
In which forms of symbiosis is neither species harmed?
Mutualism, & Commensalism
Describe the characteristics of parasitism.
Parasite & host, feeds off the blood or tissues of the host organism, parasites live in or on the host, and that parasites do not usually kill their hosts but it weaken it
What is the relationship between a Canadian lynx and a snowshoe hare is an example of?
Predator & Prey
The niche of a dog includes what?
Protection, service, food source to fleas and ticks,
What is symbiosis?
a relationship in which two organisms live in close association
What is a population?
all the members of a species living in the same place at the same time.
What is dispersion and what forms can it take give examples?
is the relative distribution or arrangement of its individuals within a given amount of space; May be even, clumped, or random
What is the difference between a predator and a parasite?
predator hunts & kills prey, parasite lives on hunt & feeds off it
What reproductive situations will limit a population's biotic potential?
the maximum amount of reproductive
What is reproductive potential and what are examples of organism with high and low reproductive potentials?
the maximum number of offspring that each member of the population can produce during it's lifetime Elephants, Humans, Dogs, Bacteria (least to greatest)
What is the density of a population?
the number of organisms per unit area or volume
What is a niche and why is it important?
the unique role of a species within an ecosystem; it allows organisms to interact
What is a parasite ? (give examples)
An organism that lives in or on another organism and feeds on the other organisms; ticks, intestinal worms, leeches
The relationship between acacia trees and the ants that live on them is an example of?
Coevolution, Mutualism
A species of plant has exponential growth after it is introduced into an area where it has never lived. What could explain the cause for this rapid growth? What is exponential growth?
Rapid growth of a population due to resources
What is exponential growth?
Rapid growth of a population, can describe the increase of something by a large amount.
What has the greatest effect on reproductive potential?
Reproducing earlier in life
What would most likely cause a large number of density-independent deaths in a population?
Severe weather & natural disasters.
If over a long period of time, each pair of adults in a population had only two offspring and the offspring lived to reproduce, the population would?
Stay the same
What is the carrying capacity of an environment for a particular species at a particular time is determined by?
The amount of the smallest resource
Why the growth of orchids on the high branches of tropical trees is an example of commensalism?
The tree is neither harmed nor helped
When can competition for food not occur?
When organisms are in separate places
