Apes unit 3 review

If the population of a country is growing at a rate of 1.75 percent per year, the population will double in approximately how many years?

40 years

country currently has a population of 100 million and an annual growth rate of 3.5 percent. If the growth rate remains constant, what will be the population of this country in 40 years?

400 million

which of the following changes would most likely lead to a mammal population exceeding its carrying capacity

A decrease in the food supply immediately after offspring are born

Describe one way an invasive species, such as the zebra mussel, can decrease the carrying capacity for a native species in an ecosystem.

An invasive species like the zebra mussel can decrease the carrying capacity of a native species like the Unionid Mussels by outcompeting the Unionid Mussels both for resources and in population size. The carrying capacity of a species is the largest amount of individuals of that species that an environment can support. Now that the Zebra Mussels have been introduced to a new environment, they will begin rapid reproduction because there are no predators that will challenge them. The Unionid are most likely specialists because they are native to the Hudson River. Due to the rapid population increase of the zebra mussel, they will both begin competing for food. However, this will disrupt the growth rate of the Unionid mussel because there is new competition for food and space in their particular niche. Unlike the zebra mussels, they cannot live off of other resources. If these resources are depleted by the Zebra Mussels both through consumption and changing the food web, the carrying capacity of the Unionid Mussels will fall because their environment can no longer sustain a larger population.

Which statement best describes the trends shown in the graph?

As the highest tax rate was reduced in the 1920s, the economy grew.

The current global human population is about 6.1

Billion, and is growing at an annual rate of 1.35 percent

Represents the maximum number of individuals that can be supported by a particular ecosystem on a long-term basis

E. carrying capacity

Cycads are gymnosperms that were diverse and abundant during the Mesozoic era. Extant species of cycads share many traits with those from the Mesozoic era. Cycads bear cones, are long-lived with slow growth rates, show late reproductive maturity, and have very few offspring. Based on this description, the cycads are

K-strategists with a Type I survivorship curve.

The rate of population growth starts to slow down at which point

The beginning of phase III

Which of the following best describes the change in the carrying capacity of the human population if growth is limited by conditions set forth by the Malthusian theory?

The carrying capacity will decrease, and the human population size will experience a dieback.

A small developing country with negligible rates of immigration and emigration is going through a demographic change. Thirty years ago the crude birth rate was 44 per thousand per year and the crude death rate was 17 per thousand per year. Now the crude birth rate is 16 thousand per year and the crude death rate is 5 per thousand per year. Which of the following statements about the country now is most likely to be true?

The country is at the industrial stage of the demographic transition.

1950, a country had a total fertility rate of 5.9. In 2010, the total fertility rate of the country was 2.3. Which of the following is most likely the reason for the change in total fertility rate?

Women had increased educational opportunities and had children later in life.

in a human population undergoing demographic transition, which of the following generally decreases first

death rate

Although the fertility rate for women in the United States has declined in recent years to a value below replacement level, the United States population is still increasing because of

immigration

Which of the following species is most likely to be an invasive species if introduced into a favorable new habitat

oyster

What happens when a country goes through demographic transition?

Historical shit from high birth rates and high death rates with minimal education to low birth rates and low death rates