AP Bio - Unit 8 Review Questions

In a population of 100 individuals, 20 individuals are born and there are 5 deaths. What is the r value? (r = per capita growth rate ---see your formula sheet)

.15

A population of 250 birds inhabit the canopy of a tropical rain forest that has a carrying capacity of 400 birds.What is the maximum population growth rate (r max) if the population grows to 283 in one year?

0.35

If the population size is 200 individuals and there is a r value of 0.3, what is dN/dt?

30

A fish population of 250 in a pond has a maximum annual rate of increase of 0.8.If the carrying capacity of the pond is 1,500 for this species, what is the expected population size after one year?

417

Which of the following best describes the difference between the total amount of DMSP produced by adults compared to juveniles at the start of the 32°C trial? (other info in google form)

Adult corals produced 5 times more DMSP than juveniles produced.

Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the spring and decreased dramatically during the summer. The researchers hypothesized that food abundance was the limiting factor for the population. Which of the following types of data would be most useful for scientists to collect at regular intervals on a designated test plot of rose plants?

Density of rose pollen produced (g/m^2)

The population of Japanese sika deer in central Japan was determined each year from 2005 to 2014. The sika deer population underwent logistic growth starting at 26,000 deer in 2005 and stabilized at 58,000 deer between 2012 and 2014. Based on these data, the rmax for this population was determined to be 0.57. Central Japan contains a variety of habitats, including forests and grasslands. Sika deer benefit from the resources in grasslands more than forests; if deforestation occurred, producing more grasslands in the region, the carrying capacity for sika deer population would increase.What would the population size of sika deer be one year after the carrying capacity increased to 70,000 as a result of deforestation? Assume rmax does not change.

The population would grow to 63,667 deer in a year, and the growth rate would decrease the following year.

Which of the following hypotheses about the effect of zebra mussels on the Hudson River community is best supported by the data in Figure 1 ? (other info in google form)

The reduction in primary productivity has resulted in an unstable community that will eventually collapse.

A fruit fly vibrates its wings to serenade a potential mate. Which describes this type of behavior?

audible

A cheetah urinates on a tree, which type of signal is the cheetah using?

chemical

Which best describes changes to trophic structure with a decrease in plant population?

decrease in primary & secondary consumers

Which of the following best describes body temperature regulation in alligators?

ectotherm that maintains body temperature through behaviors

Which is NOT a reason for exponential growth of an invasive species?

free of prey

As the population size approaches carrying capacity (K), then dN/dt...

increases slowly

Which is an organism that is disproportionate relative to their abundance, and when removed causes the ecosystem to collapse?

keystone species

Which describes the disadvantage of low species diversity in a community?

less resilient to changes in the environment

Which best describes the relationship of mistletoe that gains resources and harms the mesquite tree that it grows on?

parasitism

A group of bacteria are resistant to antibiotics. Which describes how the bacteria became resistant?

population had random mutations making them favorable in the presence of the antibiotic

Which of the following describes altruistic behavior?

selfless behavior to save the population but risk yourself

Which describes the energy resource used by chemosynthetic organisms?

small inorganic molecules present in their environment

Which best describes the relationship between metabolic rate per unit body mass and the size of multicellular organisms?

the smaller the organism, the higher the metabolic rate