Ecology - Organisms & Population Questions and Answers

reproductive barrier that prevents individuals from closely related species from interbreeding is an example of Ob sympatric speciation Oa geographic isolation of populations O c allopatric speciation d a prezygotic barrier

During the Great Depression what was the major cause of people losing their homes Fires O Flooding O Foreclosure

What type of population growth is shown in this graph A exponential growth U curve C logistic growth S curve B linear growth D negative growth

The picture above is an aerial view of Boston MA The area seen here can be referred to as which c the following O Urban expansion Urban sprawl

How did the Dust Bowl disaster during the 1930 s affect population density A Population density lowered in the West but increased in the Midwest B Population density lowered in the Midwest but increased out West C Only California was affected by the Dust Bowl

What is an independent variable A the object being used in the experiment B the variable that is changed and being tested C the information that you record or observe D the observation made that began the experiment

What is a control A the group under normal conditions that is not experimental B the variable that is changed and being tested C the information being recorded or observed

Which statement below can accurately be made by reviewing the information in the Population Density Table A China is a major player in nuclear weapons B China is totally isolated C China consumes millions of products Population Density Country Hong Kong China South Korea India Japan Vietnam United Kingdom Germany Italy France Spain Greece North Korea Mexico United States Canada Australia Population Density People Per Square Mile 17 299 1 329 1 046 868 733 702 601 521 319 238 212 211 163 86 10 8

Between 1820 and 1850 the population of American cities grew much faster than the American population as a whole True False

Under the NAFTA trade agreement which of the following is true A No trade exists with Mexico B No tariffs exist with Mexico C Mexico is a part of the WTO D Mexico exports workers to the US

A busy small business owner is considering purchasing groceries through a premium home delivery service because of its convenience The service provides the best groceries and costs significantly more than buying groceries in the store but home delivery is an attractive feature Examine the opportunity costs and trade offs of the small business owner choosing to buy groceries through this premium home delivery service Compare your findings with the opportunity costs and trade offs if the small business owner were to choose buying groceries in the store instead 4 points

Change 33 to a decimal A 0 033 B 3 3 330 0 D 0 33 Question 4 Change 77 to a decimal A 770 0 B 77 0 0 77

ow many people were expected by the organizers of Woodstock How many actually attended O 120 000 more than 2 million O 120 000 more than 400 000 O 50 000 more than 120 000

Each of the boxes below is labeled with a term from the Natural and Sexual Selection video As you watch the video place each lettered choice in its most appropriate box If you think a choice always applies to more than one term box write the letter for that choice only once in the largest of the boxes that you think it applies to a Occurs when food sources are dispersed b The process by which traits become more or less common depending on an individual s ability to mate with more or better partners c Males with ornaments that females find attractive are able to mate with more females and pass on their genes d Produces females and males of the same species that look similar e Occurs when food sources are clustered f Produces females and males of the same species that look different g The process by which traits become more or less common depending on an individual s ability to survive and gather resources h i j Results in fancy extravagant males Males that are better able to defend their territory are able to mate with more females and pass on their genes Results in males that are better suited for fighting Natural Selection Sexual Selection Female Choice Male Male Competition

Which of the following taxa indicated by the bracket is paraphyletic A B C BC DE FGHA BC DE FGH BC C DE F G

Four species of warblers live in the same tree habitat Magnolia warblers forage for insects on the lower trunk Black throated green warblers prey on foliage eating insects close to the trunk Blackburnian warblers forage high in the treetops and catch their prey insects on the wing Cape May warblers eat sap or insects gleaned from the bark Which of the following best explains how the competitive exclusion principle relates to the scenario above A B C D All four warblers have some similarities but feed from the same place in the habitat As a result the four species are able to coexist in the same habitat All four warblers have similarities in their beak structure As a result the four species compete directly with one another for food which relates to the competitive exclusion principle All four warblers live in the same habitat and have some similarities but they do not feed from the same place in the habitat As a result the four species can coexist in the same habitat All four warblers have identical beak structures but do not feed from the same places in the habitat As a result the four species do not directly compete for food so they can

Inside human intestines there are various species of microorganisms One species of bac teria synthesizes vitamin K and can outcompete E coli species which are dangerous to hu mans The bacteria species found in the human intestines does not harm its human host in any way and the species benefits from its intestinal habitat Which term best describes the relationship between the bacteria found within the in testines and humans A mutualism B predation C commensalism

Both ZDV and NVP are believed to have a damaging effect on the process of mitosis but ZDV in particular is believed to block the formation of the spindle 0 20 32 0000038 and y Chat Josep and Z Me 29 Me 2 Jose is like comm Zido Jose form in m Mel othe

Which sentence best explains why the marine animals on either side of the Isthmus of Panama are different from each other

Which two statements best describe how group behaviors affect an organism s ability to pass its traits to future generations A Participating in a group increases the chances of finding a mate and producing offspring OB Even if an individual does not survive some of its genetic relatives in the group might survive due to group behaviors OC Group behaviors always decrease the chances that an individual organism will reproduce D All individuals are guaranteed to successfully reproduce if they remain in the group

A new group of organisms moving into a favourable environment will demonstrate unlimited growth a rapid increase of population for a while a slow steady increase in population until resources limit its growth None of the above are correct

POPULATION Time Years A irregular B stable C exponential D cyclical The human population shown in graph best represents which type of growth pattern

Question 9 By tracking population change over time scientists can learn how specifi populations change and may be better able to predict how a population is likely to change in the future O True O False 2 p Question 10 2 pts

How would hunting predators to extinction in an environment alter the food web More plants would be able to grow and get larger O Prey animals would have fewer offspring and eat less O Producers would decline as the number of consumers increased Few changes would result since predators are at the top of the web

Ow E Bermuda Population 2010 Male Female Population According to this age structure diagram what i happening to this population A It is declining over time B It is not changing C It is growing exponentially D It is growing very rapidly

G E Bermuda Population 2010 Male Population A Somalia B Italy C Chad D Nigeria Female Which country might have an age structure pyramid showing declining growth that looks similar to the one shown

Male Chad 2016 A Canada AGE Population B Italy C Spain GROUP D Somalia Female Which country might have an age structure pyramid that looks similar to the one shown here that depicts very fast growth

In a food chain which of the following is an organism that eats only other animals A primary consumer B primary producer C tertiary consumer Use the food web below to help you answer this question Quaternary Consumers Tertiary Consumers Gulls and Tems Secondary Consumers Primary Consumers Primary Chesapeake Bay Waterbird Food Web Osprey Wading Birds Small Planktivorous Fish Zooplankton Large Piscivorous Fish Benthic Invertebrates Sea Ducks Bivalves Bald Eagle Herbivorous Ducks

Migration into and out of populations results in the movement of genes from one population to another This is known as 1 Point O genetic drift O adapatation gene flow

The most serious slave rebellion of the colonial period was the Stono Uprising the Middle Passage Gabriel Prosser Conspiracy Nat Turner s Rebellion

Portuguese innovations included which of the following O full use of the compass full use of the astrolabe cannons on their ships O all of the above O only a and c

Based on the BLUE line which one of the following is stabilizing selection A A B B C C A B Before After

In a population of mice living in a desert if the mice are too dark or too light colored they are easily spotted by predators This has led to most of the mice having a medium colored coat that blends best with the sand This kind of selection is known as 1 Point stabilizing selection directional selection disruptive selection 6X

A random event in a small population can lead to a change in how common you find a trait Example a flood washes away all of the brown mice in an area and only a few white mice survive This is an example of 1 Point O genetic drift adaptation gene flow mutations

Directions Take a look at the photo below and answer the questions write your thoughts on this page Then complete the Essential Question 5 Symbolism can be a very powerful force for good or for bad What does the above symbol mean to you What do you feel when you see this symbol Explain your answer

Label the chart to review the major types of microbial associations Nonsymbiotic Synergism Organisms live in close nutritional relationships required by one or both members Parasitism Commensalism Mutualism Microbial Associations Symbiotic Antagonism

16 Zebrafish a common name for several species have a high fecundity Based on this statement identify one reproductive characteristic of the zebrafish a lays many eggs at once b reproduces about once each year c feeds and protects its young for a long time d becomes sexually mature late in its life span e invests a large amount of energy in raising its young 17 A population of bacteria is growing exponentially Which of these must be true a The resources are limited b The habitat is at its carrying capacity c The birth rate is the same as the death rate d The population is growing at its biotic potential e The growth pattern can be represented by an S shaped curve 18 Which is characteristic of species with a r selected life strategy a long life span b few offspring c late maturation d high level of prenatal care e live close to biotic potential 19 Which of these is a density independent limiting factor a availability of resources b competition c population size d predation e weather

Section 11 3 Factors That Regulate Natural Populations 10 Compare and contrast density independent and density dependent factors 2 marks zoob saaril

9 One of the curves on the graph below represents a population of a certain insect capable of infesting an entire area when growing at its biotic potential The other curve represents a population of a certain mammal in a limited environment Identify the curve that represents the insect population and the one that represents the mammal population For each curve explain what is occurring in each phase and why this is occurring 3 marks Number of Organisms Growth of Populations Time ham noitslugoq

noilsluqoq tosani orll alnasengen farit eri aineeeigen tarli eno od bris 7 In a population of 5000 individuals 600 newborns are produced annually and 800 individuals die annually Determine the per capita growth rate of this population 1 mark 8 What is the growth rate of a population in a habitat that has reached carrying in your answer 2 marks

c Przewalski s horses are nearly extinct in the wild but conservation efforts hope to increase their numbers Describe some causes of extinction and make a prediction about what factors contributed to the decline of the Przewalski s horse population 2 points

Early hunters and gatherers are the likely cause of which of the following the extinction of many animals O inventing technologies to improve agriculture Ocultivating new species of plants significantly contributing to air pollution

27 Match each of the following examples with the letter to the type of evidence for evolution it best represents 6 points Although humans have no tails we still have tail bones indicating a common ancestor with other tailed vertebrates Closely related trees of the genus Nothofagus are found throughout Australia South America and Antarctica despite these continents being separated by oceans Californian and Mediterranean plants have similar adaptations to dry environments including small leaves and deep roots However they are not closely related A Fossil Record B Biogeography C Artificial Selection D Natural Selection E Convergence F Homology

16 To attract a mate male frogs produce loud croaking calls with longer and more frequent calls being more attractive to females This is an example of a intrasexual selection b intersexual selection c disruptive selection d balancing selection 17 Which conditions would be most likely to produce sexual dimorphism between males and females of a species a Resources in the area are scarce b Intersexual selection is not strong c The male and female raise their young together d The female raises her young alone

6 Which of the following criteria are required for natural selection to occur SELECT ALL THAT APPLY 4 points a Competition for resources b Gene flow c Heritable traits d Differential reproductive success e Reproductive isolation f Punctuated equilibrium g Trait variation

15 Which is not a cause of loss of biodiversity a deforestation b invasive species c overharvesting d pollution e all are causes 16 Invasive species are introduced into new environments by which method a wind b pollination c human activity d wind and human activity e pollination wind and human activity 17 Which of the following can result from human activity a a decrease in the carrying capacity of Earth for humans b an increase in the carrying capacity of Earth for humans c an effect on the carrying capacity of Earth for other organisms d both a and b h and care true

3 How does age structure influence population growth 2 marks

1 What characteristics do humans have that classify them as K selected 3 marks

Which factor describes a population with few individuals making it very susceptible to genetic drift A non random mating B migration C small populations D natural selection

What does Continuous variation caused by multiple genes most tend to look like O A clearly divided population where some individuals have the phenoytype and the remainder do not have any manifestation of the O A Bell Curve shaped continuous distribution with some individuals having low or high levels of the phenotype but the majority sho OA thee way split of the population where some individuals lack the phenotype completely say1 4 of the population some indivi population and some individuals show twice the amount of phenotype shown in the mid level individuals say 1 4 of the populat alloles this is the general distribution barring the significant impact of those factors