MES 10: Population Characteristics and Growth; Conservation 8347344 Item 27 To t
ID: 289539 • Letter: M
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MES 10: Population Characteristics and Growth; Conservation 8347344 Item 27 To test the egg-viability hypothesis, researchers set out to determine whether its predicions were borne out. Predictions of the egg-viablity hypothesis include: Prediction #1 : The probabiity of hatching falure wil be lower at higher latitudes (because temperatures remain cooler at higher latitudes). Prediction #2:: probabity of hatching failure wil be higher later in the season (because temperatures are warmer later ine season). Prediction #3: The probability of hatching failure will be higher in larger clutches (because in a Prediction 94: The probability of hatching falure will be higher for eggs laid earlser within a clutch (because eggs laid earler in a clulch have to wa f larger clutch, the earler eggs have to wat longer for incubation to begin). Citizen scientists monitored bluebird nestboxes throughout the breeding season and reporbed details such as dabe, location, number of eggs, number of graphs below show the data they colected Data ton Ca Cooper et al Geographic and seasonal gradents inhacig falune in EstBubirds Sale sale Review the graphs to determine whether the data support the four predictions longer for incubation to begin) hatchlings, and number of unhatched eggs. The th Graph C 20 20 Day of O Type here to search Thought to be Clutch SizeExplanation / Answer
1. Graph A shows that the probability of hatching failure increases later in the season. The data support Prediction #2.
2. Graph B shows that the probability of hatching failure decreases at higher latitudes. The data support Prediction #1
3. Graph C shows that the probability of hatching failure is highest for both the largest and the smallest clutch size. The data do not support prediction #3.
Explanation: The largest and smallest both show high probability of hatching failure while the prediction suggest that the large clutches will have higher probability of hatching failure.
4. Researchers were unable to test Prediction #4. This is because it was too difficult for volunteers to collect data on which eggs were laid earliest.
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