Introduction to Population Ecology quiz #2 Flashcards
Introduction to Population Ecology quiz #2
You can tap to flip the card.
Control buttons has been changed to "navigation" mode.
1/40Skip to main content
Which of the following density-independent factors can affect the size of a human population? A) Natural disasters B) Predation C) Disease D) Competition
A) Natural disasters Which species is most likely to exhibit clumped dispersion? A) Wolves B) Birds C) Dandelions D) Humans
A) Wolves Which of the following methods involves counting the number of organisms in a specific area? A) Mark-recapture B) Quadrat sampling C) Transect sampling D) Random sampling
B) Quadrat sampling What level of ecology is concerned with groups of individuals of the same species?
Population ecology Which statement best describes population growth patterns in the world today? A) Exponential growth B) Logistic growth C) Declining growth D) Stable growth
A) Exponential growth Which of the following is an example of a population? A) All the fish in a lake B) All the animals in a zoo C) All the birds in a forest D) All the humans in a city
D) All the humans in a city Which of the following is an example of an even population distribution? A) Penguins nesting B) Fish in a school C) Trees in a forest D) Birds in a flock
A) Penguins nesting What can you predict about a population with an age-structure diagram shaped like a pyramid?
The population is likely to experience rapid growth. What is the term used for the pattern of spacing of a population within an area?
Dispersion Which of the following conditions would lead to a small population size? A) High birth rate B) High immigration rate C) High death rate D) High emigration rate
C) High death rate What are the three common patterns of population distribution?
Clumped, uniform, and random Which of the following statements are true of a population at carrying capacity? A) Birth rate exceeds death rate B) Death rate exceeds birth rate C) Birth rate equals death rate D) Immigration exceeds emigration
C) Birth rate equals death rate What effect do competition and predation have on population size?
They can decrease population size by increasing mortality and reducing resources. How does population distribution differ from population density?
Population distribution refers to the pattern of spacing among individuals, while population density is the number of individuals per unit area. What best explains snowshoe hare–lynx population cycles?
Predator-prey interactions and resource availability How do age-structure diagrams predict the growth of a population?
They show the distribution of various age groups, indicating potential for growth based on the proportion of young individuals. How is a clumped population distribution beneficial for prey animals?
It provides safety in numbers, reducing individual predation risk. Which of the following would be an example of high biotic potential? A) Elephants B) Mice C) Humans D) Whales
B) Mice What are the three types of survivorship curves?
Type I, Type II, and Type III How would an ecologist calculate the future size of a population?
By using models that incorporate birth rates, death rates, immigration, and emigration. Which of the following statements best describe age structure diagrams? A) They show population density B) They show population size C) They show the distribution of age groups D) They show migration patterns
C) They show the distribution of age groups How do humans impact the carrying capacity of a population?
Humans can increase carrying capacity through technology and resource management, but can also decrease it through overconsumption and environmental degradation. Which of the following represents an example of a population? A) All the trees in a forest B) All the fish in the ocean C) All the wolves in Yellowstone D) All the birds in the sky
C) All the wolves in Yellowstone Which of the following is the best example of a population? A) All the animals in a zoo B) All the humans in a city C) All the plants in a garden D) All the fish in a pond
B) All the humans in a city Which change would cause an increase in the size of a population? A) Increased birth rate B) Increased death rate C) Increased emigration D) Decreased immigration
A) Increased birth rate Which of the following factors contribute to clumped spacing patterns? A) Territorial behavior B) Uniform resource distribution C) Social behavior D) Random seed dispersal
C) Social behavior Which of the following describes a population? A) A group of different species in an area B) A group of the same species in an area C) A group of organisms in different areas D) A group of ecosystems
B) A group of the same species in an area Which is an example of a density-independent factor on a population? A) Disease B) Predation C) Natural disaster D) Competition
C) Natural disaster Which of the following is most likely to contribute to density-dependent regulation of populations? A) Natural disasters B) Predation C) Climate change D) Habitat destruction
B) Predation What does population distribution refer to?
The pattern of spacing among individuals within a population. What are survivorship curves?
Graphs that show the number or proportion of individuals surviving at each age for a given species or group. Which has a greater biotic potential- humans or mice? Why?
Mice have a greater biotic potential because they reproduce more quickly and have larger litters. How many different trends do you see on a survivorship curve?
Three trends: Type I, Type II, and Type III What do survivorship curves display?
They display the number or proportion of individuals surviving at each age for a given species or group. Which of the following is an example of a Type III survivorship curve? A) Humans B) Elephants C) Frogs D) Birds
C) Frogs What does this survivorship curve indicate about frogs?
Frogs have a high mortality rate early in life, with few individuals reaching adulthood. What is the top-down hypothesis to explain the cyclic nature of snowshoe hare populations?
Predation by lynx and other predators controls hare population cycles. What causes populations to compete?
Limited resources such as food, space, and mates. What does a survivorship curve show?
It shows the number or proportion of individuals surviving at each age for a given species or group. Which of the following defines a population distribution? A) The number of individuals per unit area B) The pattern of spacing among individuals C) The total number of individuals D) The age structure of a population
B) The pattern of spacing among individuals
01:17
