![]() occurs by blocking the production of an enzyme.Į. occurs when a substance binds to an enzyme at a site away from the active site.ĭ. occurs when a substance other than the correct substrate binds at the active site of an enzyme.ī. the concentration gradient of salt or vinegar causes osmosis out of the food and the extreme salt or pH concentration denatures the proteins, including enzymes.Ī. the concentration gradient of salt or vinegar causes osmosis out of the food.Į. equilibrium with the environment has occured.ĭ. the concentration gradient of salt or vinegar causes osmosis into the food.Ĭ. the extreme salt or pH concentration denatures the proteins, including enzymes.ī. Salted and pickled foods can last unrefridgerated for many years becauseĪ. that enzymes are most efficient at cold temperatures.Ģ7. that temperatures only affect enzymes up to a specific temperature.Į. that enzymes will not work if temperatures are too hot (or too cold).ĭ. The vertical drop slightly after the peak of each curve on the figure illustratesĪ. pH is not related to enzyme efficiency.Ģ6. optimal temperature ranges are not the same for all enzymes.ĭ. temperature is not related to enzyme efficiency.Ĭ. temperature ranges are not the same for all enzyme activity.ī. The two data curves on the figure illustrate thatĪ. Compare the types of survivorship curves you would expect to find in human populations in industrialized countries with good health care versus African countries with a high mortality rate from HIV and other diseases due to poverty.25. Describe the effect of adding a second cause of death to the survivorship curve of Population 2 3. What type of survivorship curve is seen in Population 1? 2. NOTE: Graph points for Population 1 using dots and Population 2 using X's. Population 1 Population 2 (death from predation) (death from predation and disease) Number Percentage Number Percentage surviving surviving surviving surviving 20 10096 20 100% Generation 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 population (percentage) surviving 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 generation Figure 13.10: Percentage survivorship for two populations. Table 13.3: Number of survivors for each generation. Graph your results in Figure 13.10 using x's for your data points for Population 2. Record your data under Population 2 in Table 13.3. Repeat the above procedure except this time all the #1 dice die from predation and all the #2 dice die from disease 2. Graph the results in Figure 13.10 using dots for your data points. Take the surviving dice and repeat steps 1 - 5 for each successive generation until all the dice have died and have been set aside. Calculate the percentage of survivors using the following formula and record as the "Percentage Surviving": percentage surviving = number surviving X 100 20 6. Count the number of surviving dice and record that number in Table 13.3 as Generation 1, Population 1 "Number Surviving 5. All dice that land with the #1 on the up face will die due to predation. Put the dice in the cup, shake the cup and empty onto the tray. Population Survivorship Activity Materials Examples include fish, reptiles, and insects Type 1 Type 11 log number of survivors Type III birth death age (percent of lifespan) Figure 13.9: Three basic types of survivorship curves. Type II-the mortality rate for the young is very high few individuals reach oid age: typically type Ill organisms have a very high birth rate and provide little or no protections to their young. ![]() Some birds follow this pattern of survival. ![]() Type - the mortality rate is relatively constant regardless of age. Examples Include humans and large mammals. There are three basic types of survivorship curves (see Figure 13.9): Type ! - low mortality rate in the young most individuals die in old age: typically type organisms have a low birth rate and nurture and protect their young. Transcribed image text: SURVIVORSHIP CURVES Survivorship curves illustrate the percentage of individuals in a population that survive over the average life span of that species and provide information regarding the age structure of the population.
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