Would you classify these species as weak, moderate, or strong competitors? Explain. Think about population density. Compute the population density if necessary.

Aphids and ants can have a mutualistic relationship. Aphids exude sugary substances that provide energy for ants and ants can defend aphid colonies from predators. This experiment measured the population growth rate of aphids vs the number of aphids at the start of the experiment on plants where ants were present or absent. Please select all the statements that are reasonable interpretations of this graph. Select all that apply. A. When starting populations are low, the presence of ants does not matter. Their importance increases with higher starting population densities.   B. It appears that aphid populations founded with 12 individuals grow faster than aphid populations founded with 24 individuals when compared to each other in the same ant treatment.. C. none of the above.   D. The growth of rate of aphid populations was significantly higher when tended by ants than aphid population that were not tended   E. Ants seem to be necessary for small founding populations of…

Interspecific competition can result in? Check All That Apply competitive exclusion resource partitioning alterations in reproductive success (fitness) allele frequency changes Two species forming from one

With respect to the Lotka-Volterra predator-prey model, which of the following statements is most likely true? Under this model, it is possible for a predator to drive its prey to extinction. All of the statements are true. Non of the statements is true. This model predicts neutrally-stable predator-prey cycles, as opposed to a stable equilibrium. O In this model, an increase in searching efficiency (a) will increase the maximum prey population.

You are trying to estimate the population size of a school of fish in the Florida Keys. The first time, you sample and mark 37 sardines. The second time around, you capture 40 sardines and 13 of them were already marked. What is the estimated population size? Show your work!

What contributions have laboratory and mathematical models made to our understanding of predator–prey population cycles? What are the shortcomings of these modeling approaches? What are their advantages?

What would you conclude after comparing the survivorship of the ground squirrel and the finch?   Multiple Choice   Both have very large numbers of offspring.   Both die primarily of old age.   Both suffer high predation throughout the lifespan.   They represent different survivorship types.

Previous question: (Assume that for a given population of moose, the per-capita birth rate remains constant with population size. However, as the moose population size increases there is a linear increase in the probability of starvation and subsequent mortality due to intraspecific competition.) Assume that the population (from the previous question) does not experience competition from other species, nor predation. Write out the equation that would best be used to describe the change in population growth from one time interval to another.

How might social dominance within a population regulate population growth? In your opinion, does it create a stronger or a weaker species? Explain.

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 1990 2000 100,000 50,000 15,000 Lions Cheetahs Zebras 47,000 7,500 2,500 Which explanation is best supported by the numbers in the chart? Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs. The dwindling zebra population has led to the decline of the predator lion and cheetah populations. Overhunting of lion and cheetah populations has led to a decline in the food source population. O Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.