Exam 54: Populations

At the beginning of 2013, a yellow-bellied marmot population has 15 members.During the year, 12 new marmots are born and 2 marmots die, while 7 marmots immigrate into the area and 1 marmot emigrates.What is the population size at the end of the year?

Most mammals have relatively few offspring but sometimes spend years caring for each one.Which trade-off in terms of energy investment are these mammals making?

If a certain age interval in a population contains 10 individuals and has a mortality rate of 1.00, how many individuals are in the next-older age interval?

Refer to the equations shown. A starting population has 150 animals.During the year, 50 animals are born and 30 die.Ten animals immigrate into the population, and 5 emigrate.Which represents the change in population size at the end of the year?

Refer to the term shown. How does this term affect the shape of the population growth curve when it is multiplied by the right side of the equation given below?

In which environment would K-strategists most likely be favored over r-strategists?

Which population of organisms would be most likely to show a Type I survivorship curve?

A ship accidentally discharges a species of rat onto an island.At first, resources are abundant, and the rat population grows rapidly.But, as population density increases and resources become increasingly scarce, the population size approaches its environment's _______.

A gardener decides to estimate the population of cabbage butterflies in her garden.She captures and marks 80 butterflies with a dot of red nail polish.She sets traps, and over the next three weeks captures 250 butterflies.Of these, 50 have red dots.What is the estimated population of cabbage butterflies in this garden?

People concerned with calculating Social Security benefits would be most interested in which predictive life table calculation?

Most humans live close together in cities, and the rest are scattered in small towns and rural areas.Overall, the human population could be said to have a(n) _______ dispersion pattern.

Regarding its carrying capacity, a well-managed fish population should probably be maintained

In a life table, the proportion of individuals in a cohort that are alive at age class x is the _______.

In the graph below, which of the expressions of the exponential growth equation would need to be increased for curve 1 to become more like curve 2?

The mark-recapture method of estimating population size is most appropriate for use in populations that are

Refer to the table below, which shows hypothetical data for a cohort of robins. What is the survivorship value for the age class of 2 years?

A population following a logistic growth pattern

The average life span of the human population is steadily increasing and may reach 100 years long before the end of the twenty-first century.Much of this increase has been due to improvements in health care and nutrition.If, for some reason, these artificial methods of maintenance were no longer available, would the life span of the human population change? If so, how and why?

Refer to the figure comparing exponential and logistic growth. The extra term in the logistic equation takes into account which factor(s)?

In the spring, each male redwing blackbird establishes a breeding territory and prevents other males in its population from entering.The distribution pattern of these male redwing blackbirds is