Unit 3 EdPuzzle Questions

What two main factors would best indicate the quality of life of a country's population? a) The life expectancy and the infant mortality rate b) The total fertility rate and the death rate c) The replacement-level fertility rate and the total fertility rate d) The birth rate and the infant mortality rate e) The crude birth rate and crude death rate

a

If a country has a crude birth rate of 24 per 1,000 and a crude death rate of 8 per 1,000, the natural annual percent increase of its population is a) 0.6% b) 16% c) 1.6% d) 3%

c

Members of an r-selected species characteristically a) are very protective of their offspring b) produce few offspring have long life spans c) reach sexual maturity quickly d) grow slowly

c

Salamanders, ospreys, snapping turtles, and beavers all live in aquatic habitats. Salamanders lay their eggs in small freshwater pools and feed on insects. Osprey habitats include rivers, bays, and swamps and the birds feed on fish and other animals in the water or on land. Snapping turtles live in fresh or brackish water and feed on plants, fish, frogs, and snakes. Beavers build lodges on islands, pond banks, and lake shores and eat a variety of shrubs, grasses, and crops. Based on the information provided above, which of the following species would best be classified as a specialist? a) Beavers b) Snapping turtles c) Salamanders d) Ospreys

c

Scientists are closely monitoring caribou populations to examine the effect of global climate change on habitat. The maximum population size for a herd of caribou based on the amount of habitat was 500,000. A herd of caribou currently has a population size of 198,000 caribou as a result of habitat loss. Which of the following methods should be used to determine the percent change between the maximum population and the current population for this herd of caribou? a) 198,000/500,000 X100 b) (500,000 - 198,000) / 100 c) (198,00-500,00)/500,000 X 100 d) (500,000 +198,00)/198,000 X 100

c

Which of the following changes would most likely lead to a mammal population exceeding its carrying capacity? a) A decrease in the number adult females during mating season b) An increase in the number of predators immediately after offspring are born c) A decrease in the food supply immediately after offspring are born d) An increase in mortality of adults during mating season

c

A country has a birth rate of 35/1,000 individuals and a death rate of 13/1,000 individuals. The death rate was 37/1,000 individuals in 1950, 28/1,000 individuals in 1970, and 21/1,000 individuals in 1990. Which of the following statements best explains why the country has a declining death rate? a) The country is in stage 3 of the demographic transition, and more women are entering the workforce and shifting to having children later in life. b) The country is in stage 1 of the demographic transition, and infant mortality is high because of poor health services and high levels of poverty. c) The country is in stage 4 of the demographic transition, and the population growth rate is declining. d) The country is in stage 2 of the demographic transition, and life expectancy has increased because of improvements in public health, sanitation, and access to food.

d

If the population of a country grows at a rate of approximately 5 percent per year, the number of years required for the population to double is closest to a) 35 years b) 5 years c) 10 years d) 15 years e) 25 years

d

In a certain country, the birth rate is high, the death rate is high, and there are many children that are part of the workforce. The country is most likely in which of the following stages of the demographic transition? a) Stage III b) Stage II c) Stage IV d) Stage I

d

The K-selection reproductive strategy maximizes survival of offspring by producing a) many offspring with high levels of parental care b) many offspring with low levels of parental care c) few offspring with low levels of parental care d) few offspring with high levels of parental care

d

The Venus flytrap is a carnivorous plant that grows best in nutrient-poor, acidic soil. They typically grow in certain longleaf pine savanna ecosystems in the Carolinas. Which of the following terms best describes this species? a) A generalist species, because it is advantaged in changing habitats. b) A keystone species, because it is carnivorous. c) An invasive species, because it competes with other plants for water and sunlight. d) A specialist species, because it thrives only in soils with low pH and nutrient levels.

d

Factors that affect the total fertility rate of a human population include which of the following? I. Cultural traditions II. Government policies and economic incentives III. Education level and economic opportunities for females a) II only b) II and III only c) I and II only d) I only e) I, II, and III

e