Questions

Recent research has shown that von Frisch was not completely correct about the difference between the round dance and waggle dance The new information suggests that in honeybees the waggle dance communicates the type of food round dance communicates the time of day the food will be available round dance communicates direction as well as distance waggle dance communicates the favored food of the hive waggle dance communicates information about the quality of the food

Which of the following is responsible for the differences in summer and winter temperature stratification in deep temperate zone lakes Water is densest at 4 C Oxygen is most abundant in deeper waters Winter ice sinks in the summer Stratification is caused by a thermocline Stratification always follows the fall and spring turnovers

From our population growth models our population of 8 billion people would take years to double at growth rate of 1 8 However Hans Rosling predicts the world population to be around 11 billion at the end of this century which contradicts the growth model estimate Why What differs between the two estimates Be precise

Hare density relative to controls Control Predators excluded Food added Predators excluded food added Looking at the data in the figure above from the hare lynx experiment what conclusion can you draw 1 II Food is a factor in controlling hare population size Excluding lynx is a factor in controlling hare population size III The effect of excluding predators and adding food in the same experiment is greater than the sum of excluding lynx alone plus adding food alone Only I Only II Only III Only II and III I II and III

What differentiates deep ecology from mainstream ecology

Hans Rosling talks about peak child in his presentation Don t panic What doe this term peak child refer to Minimum child per family O Healthy robust and educated children per family Two child per family No child per family Maximum children per family

A queen bee polices the nest of her colony killing all eggs laid by workers This behavior is an example of acting in favor of the good of the species kin selection reciprocal altruism manipulation cooperation

A Retake question 500 8 C B 100 2050 projections 2000 data 65 2050 projections 60 55 50 45 2000 data 40 35 35 30 30 25 25 20 20 15 15 10 females Males 10 Femiles S S 0 O 100 0 100 200 400 500 300 200 100 0 100 200 300 100 95 2000 data D 75 2000 data 6 60 70 2050 projections 70 65 60 55 55 projections 50 50 45 45 40 40 35 35 10 30 25 25 20 20 15 15 10 Females Males 10 S 0 300 200 100 200 300 Females 300 200 100 0 200 300 Males Based on the diagrams in the figure which graph best reflects U S population 150

An ecologist decides to study the effect of pathogens of the pollinator of a particular plant species on the reproductive success of the pollinator Which level of ecological study does this variable represents Ecosystems ecology Organismal ecology O Community ecology Population ecology Global ecology

Flycatcher birds that migrate from Africa to Europe feed their nestlings a diet that is almost exclusively moth caterpillars The graph below shows the mean dates of arrival bird hatching and peak caterpillar season for the years 1980 and 2000 1980 125 April I peak bird arrival 13 June former peak bird hatching 2000 and caterpillar season May 25 new peak bird hatching May 15 new peak caterpillar season 1 April 1 May 1 June The shift in the peak of caterpillar season is most likely due to

Maya population density Forest cover Soil erosion Low Forested Open High Low 5000 4000 3000 2000 1000 0 Year BP Copyright 2003 American Institute of Biological Sciences Foster D R F Swanson J Aber D Tilman N Brokaw I Burke and A Knapp 2003 The importance of land use and its legacies to ecology and environmental management BioScience 53 77 88 Based on the figure above what can you conclude about the history of land use in the southern Yucat n This Mayan population practiced sustainable development

Population size a Density dependence Growth rate slows at high density B A Time C In the figure above which letter indicates areas where r max is possible Arrow A Arrow C Arrow B None of the letters shown here

Percentage of females with mature follicles 100 Female paired 80 60 40 20 0 with male Female with group of males Female with group of castrated males All female group Female alone Females in natural winter habitat 0 1 2 3 4 5 6 Weeks In the above figure which of the following conclusions is most logical based on the data Females produce eggs faster when exposed to many males than do females paired with a male It is too complex to infer any logical conclusion After four weeks together females with males produce mature follicles to the ortant or females without males

B Take Test Lab Homework 2 D 2626

1 6 pts Rewrite the rational function g x are constants x 7 X in the form g x c where c and r

1 point The study also found that the coefficient of determination between the two variables is 75 8 What would be the correlation between the two variables 0 5746 0 8706 0 8706

1 point The correlation coefficient between the number of practice sessions and musical performance scores was found to be 0 92 What would be the percent of variation in musical performance scores that can be explained by the variation in the number of practice sessions 95 9 84 6 92 0 O We cannot determine the answer using the information given

t elihood of encountering heavy rain on a given day is 0 6 and the probability of experiencing light rain is 0 3 Assuming these two types of rain are disjoint what is the bility of encountering heavy rain or light rain on that day D

1 point In a recent study it was determined that 35 of Canadians enjoy eating fries with mayonnaise If a random sample of 10 people is selected what is the probability that exactly 4 Canadians eat fries with mayonnaise 0 2585 0 7515 0 2377 0 3500

a 3871 b 3871 c 2622 d 3410 e 2622 O f 1498 You are given the following set of data points x y 3 6 12 8 7 2 Find the correlation coefficient of this sample

1 point A study at SDSU found that 18 of students have attended a football game For a random sample of 70 students what would be the mean and standard deviation for the number of students that have attended a football game 0 18 3 2143 H 0 18 0 0459 12 6 3 2143 12 6 10 332 O Next

A health analyst sought to investigate whether the temperature of a room x in degrees Celsius could affect a person s typing speed y wpm A regression equation modeling this relationship was determined to be 60 585 0 958x For one individual within the sample collected the room was set to 20 degrees Celsius and their typing speed was 45 wpm What would be the residual for this person 41 425 3 575 3 575 41 425

When we sample with replacement we have independent trials True False

The correlation coefficient between the number of practice sessions and musical performance scores was found to be 0 92 What would be the percent of variation in musi performance scores that can be explained by the variation in the number of practice sessions 95 9 84 6 92 0 We cannot determine the answer using the information given

1 point When it comes to the Binomial distribution the following statement must be true The sample size has to be greater than 10 of the population size Each of the observations or trials are independent Each trial has at least two possible outcomes The probability of success may change from trial to trial

1 point If two events are independent events they must also be disjoint events True False

At a zoo there are 9 dolphins and 6 penguins If two of these animals are selected with replacement what is the probability both animals chosen will be dolphins 0 36 0 16 0 1429 0 3429

1 point D The probability of winning a chess match is 0 3 event A and the probability of successfully solving a jigsaw puzzle is 0 6 event B Assuming these two events are independent what would be P A or B 0 90 0 72 0 0 18

1 point Identify which variable s is continuous Number of cars owned O A person s shoe size Number of residents in San Diego County The length of a person s foot All of the above

Regression Stimulus A least squares regression model was formulated to analyze the relationship between a student s class grade y and number of hours partying x in a semester The model is given below 75 0 20x 2 1 point The correct interpretation of the slope would be For every increase in a student s class grade partying increases by 75 hours For every hour increase in partying a student s class grade increases by 75 For every increase in a student s class grade partying decreases by 0 20 hours For every hour increase in partying a student s class grade decreases by 0 20

S 1 point When it comes to regression analysis which of the following statements are true 1 A residual plot with a fanning pattern suggests that the regression model has good predictive power II The correlation coefficient is sensitive to outliers III The explanatory variable must be quantitative and the response variable must also be quantitative I only I II and III Ill only II and III only Il only

point In a garden with 14 flowers 9 are roses If two flowers are picked at random without replacement what is the probability that only one rose is chosen 0 4592 0 4946 0 2473 0 6429

Australia is located in what hemisphere O North Eastern O South Eastern O South Western O North Western

Write the sum as a product Next cos 24 3t cos 12 3t Note coefficients inside of the trigonometric functions should be entered as simplified decimal

1 2 6 5 45 Which number is the location of the Coral Sea 02 03 06 7

Simplify the following radical expression by rationalizing the denominator 3 20

Select the statement that can be represented by 10 dollars O Kyle found 10 on the sidewalk O Janet withdrew 10 from her checking account O Joe earned 10 mowing his neighbors yard O Sally deposited 10 into her savings account

1 Which number is the location of Ayer s Rock 02 03 05 9 6 7

Which point represents the opposite of 11 b d 3 2 1 0 1 2 3 O a Ob Oc d

Which of the following includes only counting numbers and O O rational numbers O integers O whole numbers

Which of the following points is NOT a negative number W X Y Z 6 4 2 0 OW OX OY 2 6

Which integers on the number line are opposites a b 10 8 6 4 2 02 4 6 8 10 a and b Ob and c Oc and d O a and d

Which scenario can be represented by the value 15 OA roller coaster begins at 90 feet above ground level Then it descends 85 feet O Jim s bank charged him 15 for an overdraft fee Then he deposited 30 O An elevator went up 6 floors and down 9 floors On the first play the football team lost 10 yards On the second play the team lost 5 yards

13 log 4 10 1 7 log 6 1 3 log4 7 1 4 Find log4 72 5

Which of the following points represent positive numbers O a and c O a and b Ob and d a and d a C b 0

Which is the only function below that could have a range of f x 1 i e 1 3

FILL OUT THE TABLE LABEL DIAGRAM Classification Agonist Antagonist GRAD Fixator Synergist Description Definition

Which is the only function that could have a range of all real number i e 0 0 A linear function A quadratic function O An exponential function None of the functions could have a range of all real numbers

Which is the only function below that could have a range of f x 3 i e 3 43 1 1 2 3 2 f x x 3 f x 10 2 2

SKELETAL MUSCLE ketch Label nuclei striations SMOOTH MUSCLE Sketch Label nuclei muscle cells CARDIAC M Sketch Label n intercalat