Use the survivorship curves (A, B, and C) shown on the graph below to answer the following three questions. A B C Age Which curve best describes survivorship in clams? (Clams have external fertilization and free-swimming larval stages.) Curve A Which curve best describes survivorship in mice? Curve C Which curve best describes survivorship in a species, such as humans, that invests a great deal in caring for the young over a very long period of time? Curve B

Use the survivorship curves (A, B, and C) shown on the graph below to answer the following three questions. A B C Age Which curve best describes survivorship in clams? (Clams have external fertilization and free-swimming larval stages.) Curve A Which curve best describes survivorship in mice? Curve C Which curve best describes survivorship in a species, such as humans, that invests a great deal in caring for the young over a very long period of time? Curve B

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter44: Population Ecology

Section: Chapter Questions

Problem 1CT: Think back to Section 44.6. When researchers moved guppies from populations preyed on by cichlids to...

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Think back to Section 44.6. When researchers moved guppies from populations preyed on by cichlids to a habitat with killifish, the life histories of the transplanted guppies evolved. They came to resemble those of guppy populations preyed on by killifish. Males became gaudier; some scales formed larger, more colorful spots. How might a decrease in predation pressure on sexually mature fish allow this change?
Answer the following questions using this information: Bowhead whales can live up to 150 years, reproducing first when they reach 25 years of age, which is when they leave their mother. The survival curve for this whale species is shown below. Indicate which answer is correct about this whale. % alive age in years 150 O They have a type 1 survival curve and show little parental care of offspring. O They have a type 2 survival curve and show strong parental care of offspring. They have a type 1 survival curve and show strong parental care of offspring O They have a type 3 survival curve and little parental care of offspring.
Please choose on of the best answer that fits for this multiple choice question, Thank you 1)Consider a predator-prey relationship between crabs and sea snails. The crabs use their claws and jaws to crack open the shells of the sea snails, and so, by the principle of natural selection, any snail with a thicker shell would have an advantage and thicker shells would become more abundant. This in turn would create a selective pressure for stronger claws and jaws in the crabs, which in turn would give a selective advantage to snails with even thicker shells. This type of interaction between predators and prey is an example of A)secondary succession B) coevolution C)primary succession D)symbiosis E)competition
You are studying the effect that the commonly used agricultural pesticide "Pestkill" that has been found in bodies of water has on the survival rate of eggs of dragonflies. How will you label your X and Y axes? Check all that apply. Pestkill concentration (mg)" as Y axis label, "percentage of eggs hatched in two weeks" as X axis label "Pestkill" as X axis label, "number of eggs" on Y axis "Pestkill" as Y axis label, "number of eggs" on X axis "Pestkill concentration (mg)" as X axis label, "percentage of eggs hatched in two weeks" as Y axis label
Is the following case study an r-strategists or a K-strategists? Andean condors reach sexual maturity at five to six years. Reproduction is slow; females lay only one or two eggs every other year. Offspring are cared for by both parents for at least one year. Andean condors are long-lived and can survive for seventy to seventy-five years.
A group of researchers are interested in whether temperature has an affect on time to metamorphosis in a species of frog. Eggs from a single pond were obtained and raised at either 15°C or 25°C until metamorphosis completed. Time (days) 15°C 25°C 360 379 375 353 354 299 378 349 385 323 359 298 371 301 355 375 μ 367.1 334.6 S 11.66 33.85 Time to metamorphosis at 25°C quantile Time to metamorphosis at 15°C quantile 385 380 375 370 365 360 355 +3 -1.5 380 360 340 320 300 -1.0 -0.5 00 05 10 1.5 Normal quantile -1.5 -1.0 -0.5 00 0.5 1.0 Normal quantile a) List the potential statistical tests that could be used to test the researcher's hypothesis, how they compare in terms of power, and the assumptions made by those tests. (3 marks) b) Based on the data, which test should be used? Provide a brief explanation and test any assumptions, as necessary to come to your conclusion. (4 marks) c) Conduct a statistical analysis using that test. (8 marks)
Since 1972, Dr. Jim Estes had been studying a food chain of kelp -> urchins -> sea otters, and then in the early 1990s orcas began eating the sea otters. The data collected by Dr. Estes are shown. Panel A shows sea otter abundance around four different islands from 1972 to 1997. Panel B shows the amount of sea urchins (sea urchin biomass) in 1987 and 1997. Panel C shows the amount of kelp that sea urchins ate over a 24- hour period (grazing intensity) in 1991 and 1997. Panel D shows the number of kelp plants within a specific area (density of kelp) in 1987 and 1997. The thickness of the arrows illustrates the strength of the effect one species has on the species below it in the food web. Sea otter abundance -Amchitka L N. Adak I. Kagalaska i. L Riskal. Sea urchin biomass Grazing intensity Total kelp density 1972 1985 1989 1993 1997 Year In 1997, which species is the apex predator in the food chain? No. per 0.25 m % loss 24hr gms 0.25m Otter No. (% max. count)
Is the following case study an r-strategist or a K-strategist? American toads practice explosive reproduction. During the first warm days in spring, both males and females migrate from forests and converge on ponds. Reproduction is quick, taking only a few days. Females lay hundreds of eggs in jelly-filled sacks along the sides of the pond or stream. As soon as the eggs are laid, males and females abruptly leave the pond. Offspring are left to develop, hatch, and grow on their own, maturing in about three months.
Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. In area 2, stomach content data of oxpeckers showed they consumed ~400 ticks per day. Cows were infested experimentally with large numbers of tick larvae and then oxpeckers were introduced at different stages in the tick life cycle (larvae; nymph; adult). They counted the number of adult ticks that dropped off the…
Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. Given the data described in the introduction to this section, what effect do African mammals have on oxpeckers a) Positive b) negative c) neutral
https://pubmed.ncbi.nlm.nih.gov/28671715/ https://www.sciencedirect.com/science/article/abs/pii/S004896971 Discuss the chimpanzee species is an endangered, by using thoes two sources.
You are studying the effect that the commonly used agricultural pesticide "Pestkill" that has been found in bodies of water has on the survival rate of eggs of dragonflies. How will you label your X and Y axes? Check all that apply. A "Pestkill concentration (mg)" as X axis label, "percentage of eggs hatched in two weeks" as Y axis label B "Pestkill" as X axis label, "number of eggs" on Y axis C "Pestkill concentration (mg)" as Y axis label, "percentage of eggs hatched in two weeks" as X axis label D "Pestkill" as Y axis label, "number of eggs" on X axis