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I need to take pictures of a list of bio terms and put in a powerpoint and explain how each picture fits the term. Heres the words i need help on:
Population
Community
Ecosystem
Organism with Type III SUrvivorship Curve
Density dependent factor
Density independent factor
R Strategist species
Ecological Niche
Parasitism
Mutusalism
Commensalism
Climax community
Keystone species
succession
Biodiversity
Heterotroph
Decomposer
Euthrophication
Biological magnification
climate change
interspecific competition
intraspecific competition
Pioneer species
food web

Can you please help me with my sciene homework.. I don’t understand it and i can’t find it in the text book
1. A _____ is the role an organism plays in the ecosystem.
a habitat
b symbiosis
c population density
d niche
2 _____ is the largest number of individuals of a species that an environment can support and maintain for a long period of time.
a Population size
b Limiting factor
c Carrying capacity
d Symbiosis
3 The number of individuals in a population is the population’s _____.
a carrying capacity
b size
c density
d spacing

A interaction is which both species benefit is best described as
• commensalisms
• mutualism
• predation
• parasitism
The number of individuals in a given area or volume of a habitat is
• the population density
• the population growth
• the population birth rate
• the population size
In natural communities, some feedback mechanisms operate whenever populations change in size, they are
• density-dependent factors
• density-independent factors
• always intrinsic to the individuals of the community
• always extrinsic to the individuals of the community
A population that is growing exponentially in the absence of limiting factors can be illustrated accurately by a(n)
• S-shaped curve
• J-shaped curve
• Curve that terminates in a plateau phase
• Tolerance curve
During the spring, male prairie chickens gather in open grassy areas an shuffle in a dance with their wings drooped, head erect and tail feathers spread. The function of this dance is to
• frighten off smaller birds from the territory
• select the showiest females to mate with
• attract the attention of the females
• imprint the younger male birds
• teach courting behavior to younger male birds
The maximum rate of increase per individual under ideal conditions is called the
• biotic potential
• carrying capacity
• doubling time
• population size
Female insects often attract mates by releasing sex pheromones. This signal is
• visual
• acoustical
• tactile
• chemical
The maximum number of individuals of a population (or species) that a given environment can sustain indefinitely defines ___________.
• exponential growth
• the carrying capacity of the environment
• the doubling time of a population
• density-independent factors
Newly hatched goslings follow any large moving object to which they are exposed shortly after hatching; this is an example of
• homing behavior
• imprinting
• piloting
• migration
The number of individuals that contribute to a population’s gene pool is
• the population density
• the population growth
• the population birth rate
• the population size
A young toad flips its sticky-tipped tongue and captures a bumblebee that stings its tongue; in the future, the toad leaves the bumblebees alone. This is and examples of
• instinctive behavior
• a fixed reaction pattern
• altruistic
• learned behavior
A newly mated queen ant found an ant nest in an unoccupied patch of suitable habitat. Assuming that no disasters strike the nest, which of the following types of equation is likely to best describe its population growth?
• linear
• quadratic
• logarithmic
• logistic
• exponential
Which of the following is NOT characteristic of logistic growth?
• S-shaped curve
• Leveling off of growth as carrying capacity is reached
• Unrestricted growth
• Slow growth of a low-density population followed by rapid growth
The range of all factors that influence whether a species can obtain resources essential for survival and reproduction is called the __________ of a species.
• habitat
• niche
• carrying capacity
• ecosystem
Assuming the birth and death rate remain constant, in the equation G = rN, r is equal to
• the per capita rate
• the minus migration factor
• exponential growth
• the net reproduction per individual per unit of time
A one-way relationship in which one species benefits an the other is directly harmed is
• commensalisms
• competitive exclusion
• parasitism
• mutualism
Answes:BAABCADBBBDCCBDC

1. The number of individuals in a population is the population’s _____. (1 point)
carrying capacity
size
density
spacing
2. _____ is the largest number of individuals of a species that an environment can support and maintain for a long period of time. (1 point)
Population size
Limiting factor
Carrying capacity
Symbiosis
3. A _____ is the role an organism plays in the ecosystem. (1 point)
habitat
symbiosis
population density
niche

1) A condition in the environment that can restrict a population’s growth is a
A) Niche
B) Limiting factor
C) growth factor
2) Which of the following is a measurement of population density?
A) The number of frogs in a pond
B) The number of deaths per year
C) the number of bacteria per square millimeter
3) Which would be least likely to be affected by a density-dependent factor?
A) A small, scattered population
B) A large, dense population
C) A population with a low death rate
Complete each sentence or statement:
The ___method of estimating population size involves measuring every member of a species within a small area.
Space, food, and ___ are density-dependent factors.

1. _____ is the number of organisms within the same species that inhabit a specific area. Population density Exponential growth
Population dispersion A limiting factor
2. What is a community? a group of different species that inhabit the same environment a group of organisms that are of the same species and share a habitat
the species, abiotic factors, and biotic factors that inhabit the same environment the abiotic factors of a habitat
3. When one organism hunts another organism, what type of relationship exists? symbiotic predation
mutualism commensalism
4. _____ are organisms moved from their native environment to a new, nonnative habitat. Niches Parasites
Introduced species Communities
5. Even, random, and clumped all describe types of _____? exponential growth population density
population dispersion limiting factors
6. Which of the following is NOT an example of a limiting factor? habitat space availability of food
outbreak of disease migration
7. What causes interspecies competition within a community? when two or more species compete for resources when a single species dominates the food supply
when two species have different dietary requirements when a single species requires a variety of food sources
8. If there has been a competitive exclusion within a community, what has occurred? A species that had previously competed for food has been eliminated from the community by a more efficient species. Limiting factors have decreased competition within the community.
The carrying capacity of the habitat has been reached. Two species that previously competed for food have begun to share the resources equally.
9. In which of the following relationships do both of the organisms involved benefit from one another? predation mutualism
commensalism parasitism
10. Which of the following factors influence the global distribution of ecosystems?
I. atmospheric circulation
II. oceanic circulation
III. land formations
IV. local environmental conditions
I and II I and III
I, II, and IV I, II, III, and IV
11. Before the 20th century, the growth of the human population was relatively _____. rapid slow
unstable exponential
12. No two species in a single community occupy the same _____. population ecosystem
niche habitat