APES Unit 3

At the start of a study there were 200 spotted salamanders in an old-growth forest patch in western Oregon. Over the next year a biologist tracking the salamanders saw that 25 new salamander hatched and 5 died. What was the population growth rate for that year?

0.1

The infant mortality rate and the child mottality rate are defined as the number of deaths per 1,000 live births for children under ______ and ______ of age, respectively

1 year, 5 years

In 2018, the global crude births rate was 23 and the global crude death rate was 9. What was the global population growth rate?

1.4 percent

Approximately how many males in population A are under the age of 10?

130,000,000

Population A would most likely be which phase of demographic transition?

2

A population of bacteria in a Petri dish is growing at an exponential rate. Assume a starting population of 200 bacterium. If the growth rate for the species increases 10 percent every hour, approximately how long will it take for the number of bacterium to reach 400?

7 hours

Using the rule of 70, a population growing at 10 percent would double in?

7 years

Country A has a higher crude death rate than country B, but country A has a higher standard of living. What is one likcly explanation for this deviation from the norm?

Country A bas an older population.

Which endangered species has suffered inbreeding depression because of population size?

Florida panther

Which pattern describes a type I survivorship curve?

High survival throughout the lifespan until individuals die in old age

A country's impact on the environment in influenced by I population II technology III affluence

I, II, and III

Which caused the human population to rapidly increase in the 1600s? I Balling death rates II an increase in agricultural output III burth rates remaning high

I, II, and III

Which a NOT a reaction that the agricultaral revolution led to increase in the human population?

It reduced the amount of pesticides used on crops

A population of mushrooms is experiencing exponential growth. When graphed, this population would display a(n) _____ shaped curve since the population _______ limited by resources

J; is not currently

Which bet deicribe, the effect of bright coloration in prey?

Predators have learned that brightly-colored prey are often toxic

Which is NOT true of developing countries?

Replacement-level fertility low

Which best explains the high rate of human population growth in the last 8,000 years?

Technology has allowed the species to increase Earth's carrying capacity.

Which is NOT a reason that populations of predators increase when populations of prey are high?

There is more competition among predators for prey.

Which of the following accurately compares growth patterns in eagles and bacteria?

Under ideal conditions, bacteria and eagle populations both grow exponentially.

In phase 3 of a demographic transition, ___________ increases while _____________ decreases.

affluence; the crude birth rate

An inbreeding depression can lead to

an increase in the expression of harmful genetic mutations

Which might a prodator use to catch its prey?

camouflage

During a single Oregon winter, minimum temperatures did not get much below freezing. The following summer large mosquito populations were observed in ponds. Cold weather came early the next winter and most ponds froze for 3 months. The following summer, very low mosquito populations were observed. What best explains this pattern in the mosquito population?

density-independent factor

Which is NOT likely to limit a population's size?

genetic diversity in a population

Population A is most likely

growing rapidly

When an insect eats the lettuce seedlings in your yard, it is engaging in

herbivory

Which is NOT an example of two organisms in a mutualistic relationship?

humans and the protozoa that cause malaria

Which factor is NOT considered when estimating world popalation?

immigration

If the growth rate of a popolation is positive and remains constant, the number ot people added to the population

increases each year

The human population is currently following a roughly j-shaped curve. This means that the population is

increasing exponentially

A species that plays a major role in determining the structure of its ecological community is

keystone species

Darwin's study of finches in the Galapagos Islands provides an example of

morphological resource partitioning

The roots of many plants are infected with a specialized fungus. The plant supplies carbon to the hungus, and the fungus supplies nutrients to the plant. How can this relationship be classified?

mutualistic

In phase 2 of a demographic transition, there is _____ in the crude birth rate and _____ in the crude death rate

no change; a decline

When interspecific competition occurs between two species with the same realized niche

one species will perform better and drive the other to extinction

A biologist who studies interactions at the community level investigates internctions between

populations of more than one species

After a forested arca is clear cut, what type of succession occurs?

secondary

Which factor is NOT typically density-dependent on an animal's population?

severe storms

A population of rabbits, introduced to an island, has rapid growth for a few years; then its growth slows. What is a likely reason for this pattern?

the carrying capacity has been reached

Which is a density-independent factor that can limit population size?

weather