Unit 2 2.4-2.7

Which is the best description of natural disruptions

• They are only caused by humans

• They can occur periodically or randomly

• They always cause complete destruction of an ecosystem

• They are always detrimental to ecosystems

Tags

NGSS.MS-ESS3-2

An ecosystem that rapidly returns to its original state after a disturbance is

• resistant

• resilient

• stable

• adaptable

According to the graph, what effect will an intermediate level of disturbance have on an ecosystem?

• An intermediate level of disturbance will decrease primary productivity

• An intermediate level of disturbance will increase runoff

• An intermediate level of disturbance will increase species diversity

• An intermediate level of disturbance will decrease biomass

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which of the following best describes the relationship between species richness and disturbance?

• As species richness increases, the level of disturbance increases to a max, and then decreases with more species richness

• As species richness increases, the level of disturbance decreases

• As the level of disturbance increases, species richness decreases

• As the level of disturbance increases, species richness increases to a max, and then decreases with further disturbance

Tags

NGSS.HS-LS4-5

Which of the following best explains why an extreme level of disturbance will greatly affect species richness?

• Ecosystems where disturbances are rare will have increased species richness, as they favor generalist species with a good ability to compete

• Ecosystems where disturbances are rare will have decreased species richness, as they favor specialists species with a good ability to compete

• Ecosystems where disturbances are frequent will have increased species richness, as they favor generalist species with a good ability to reproduce

• Ecosystems where disturbances are frequent will have decreased species richness, as they favor specialist species with a good ability to reproduce

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

Which is a measure of how much a disturbance can affect the flows of energy and matter in an ecosystem?

• diversity

• intensity

• resistance

• resilience

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-3

A phenotype is best described by which of the following?

• it is an adaptation that creates a new species

• it is the genes of a particular individual

• it is a result of genetic recombination

• it is the set of traits expressed in an individual

Tags

NGSS.MS-LS4-4

Which is the best definition of an adaptation?

• a mutation that creates a new species

• a trait that improves an individual's fitness

• a trait that is passed on to the next generation

• a trait created by natural selection

Tags

NGSS.MS-LS1-4

The change in the genetic composition of a population over time due to random mating is called

• the bottleneck effect

• gene flow

• genetic drift

• mutation

Spider monkeys are omnivorous animals that are found in tropical rain forests. In the wild they have fur ranging in colors from black, brown, golden, red, or tan. In a particular zoo, a small population of spider monkeys has a higher proportion of individuals with light, golden brown fur than spider monkeys found in the wild.

If the monkeys were recently captured from the wild and if fur color is largely determined by genetics, what evolutionary process is at work?

• the founder effect

• the bottleneck effect

• artificial selection

• genetic drift

Tags

NGSS.MS-LS4-4