A population of squirrels eats acorns from the local oak trees. Some years, oak trees produce many more acorns than usual.  Which of the following is the most direct effect of an increase in the number of acorns on the squirrel population?*2 puntosThe size of the population increasesThe population has fewer predatorsThe population expands its territory to new habitatsPopulation size decreases due to competition

A population of foxes inhabits a small forest. The size of the population is currently below the forest's carrying capacity for the foxes. Which factor could cause an increase in the population's growth rate? A. The population's level of immigration falls below its level of emigration. B. The population's birth rate falls below its death rate after a predator is introduced. C. An increase in food availability increases the birth rate in the population. D. A lack of mating opportunities increases the population's level of emigration.

hich of the following is most likely to cause the greatest increase in the corvina population?*2 puntosA decline in the algae populationAn increase in the population of anchoviesA decline in the population of blue fishA decline in crab population

Read each of the scenarios below. Then, select the option that best represents a scenario illustrating natural selection.A In a population of birds, those with larger beak sizes are better able to crack open tough seeds, providing them with a food source during periods of scarcity. Consequently, the average beak size in the population decreases.B In a population of flowers, those with a particular color variation attract more pollinators and produce more offspring. As a result, the proportion of flowers with that color variation decreases over generations.C In a population of rabbits, those with longer legs are more successful at outrunning predators and are more likely to survive and reproduce. Over time, the average leg length in the population increases.D In a population of fish, those with brighter colors are more easily spotted by predators, leading to higher mortality rates. As a result, the proportion of fish with bright colors increases over time.

A deer population has access to abundant but limited resources.  As the size of the deer population increases, how will this growth affect their population density?*2 puntosThe population density remains constantPopulation density increases until resource limit is reachedPopulation density grows indefinitelyPopulation density decreases

Two squirrel populations are said to have very little gene flow. What will most likelyhappen to these populations?Group of answer choicesThe populations will evolve at the same rate.There will be an increase in diversity within both populations.Both populations will develop the same ratio of alleles.The populations will evolve separately from each other.