MES 10 Population Characteristics and Growth Conservation Microsoft Edge Passign
ID: 289134 • Letter: M
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MES 10 Population Characteristics and Growth Conservation Microsoft Edge PassignmentProblemiD-8347344 MES 10: Population Characteristics and Growth; Conservation tem 27 A population's life history consists of its schedule of reproduction and survival, including age at first reproduction, number of offispring. frequency of reproduction, and amount of parental care. In birds, clutch size (the number of eggs per brood) is an important life trait, and variation in clutch size is the subject of extensive ecological research. astern bluebirds are small songbirds that are widespread across easterm North America. Bluebirds nest in natural tree cavities such as abandoned woodpecker holes or in nest boxes provided by bird lovers Easterm bluebird females usually lay two or three clutches of 3-6 eggs each per breeding season, which is in the spring. Late-season clutches are typically smaller than early-season clutches. Clutch size also displays a geographical gradient larger clutches are laid at higher latitudes. What accounts for these seasonal and geographic differences in clutch size? One hypothesis- the egg-viability hypothesis- proposes that the varlation in clutch size results from reduced viability of eggs in warm temperatures. Observations that led scientists to develop this hypothesis include Birds typically lay one egg a day until the clutch is complete. At that time, they begin incubating all the eggs together, resulting in an equal pace of development. . As long as the surrounding temperature is below 24-26'C (75.2-78.8-F), the temperature that triggers development, the earlier- laid eggs "keep. However, when eggs are exposed for an extended period to a temperature range between the trigger temperature and the optimum incubation temperature, 36-39 (968-1022F), development goes awry. What prediction(s) can researchers make based on the egg-viability hypothesis? Select all that apply The probablity of hatching failure wil be higher for eggs lad later within a clutch. The probability of hatching faire wil be lower at higher lattudes The probablity of hatching faire wil be higher in large clutches. The probability of hatching failure will be higher later in the spring season. Type here to searchExplanation / Answer
According to the Egg viability hypothesis, in order to maximise the hachability of the eggs, the avian parents must increase their incubation period in order to hatch the eggs before the clutch is even complete. This increase of the incubation period is due to the fact that with the increase the ambient temperature of the region, the hatchability of the eggs is decreased. Therefore the incubation period is enhanced.
Therefore out of the given options the probability of the egg failure will be more for he eggs hatched later than the clutch and the eggs laid in spring season. These inference were drawn keeping in mind about the temperature conditions during that season and the conditions under which the eggs are being laid.
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