Unit 4 Test Review - Ecology

What should you be able to understand by analyzing this data table?

• each population reached the carrying capacity at different weeks

• the population in petri dishes 9 and 10 were unable to reach carrying capacity before the end of the investigation period

• the population in petri dishes 11 and 12 reached carrying capacity at week 5, the data shows there were fewer plants for the rest of the investigation period

• the populations had different starting population numbers that grew at the same rate and reached carrying capacity at the same time

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What's happening at point A on the graph?

• the population is reaching carrying capacity and stabilizing

• the population growth is decreasing

• a predator was introduced, causing a decline in the population

• the health of the population improved, causing the population to stabilize

Tags

NGSS.MS-LS2-4

What conclusion can you draw from the graph about the time period between 1800 and 1835?

• there were many limiting factors and the ecosystem was beyond carrying capacity

• there were few limiting factors and the ecosystem was beyond carrying capacity

• there were few limiting factors and the ecosystem had not yet reached carrying capacity

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which animals are LEAST likely to do well in a forest that is rebuilding 10 years after a fire?

• snakes that hide in grassy areas

• deer that feed on grass and small bushes

• butterflies that feed on the nectar from flowers

• eagles that build large, heavy nests in tall trees

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Why can introducing a new species (like Kudzu) to an existing ecosystem often be a disaster?

• new species can rapidly evolve into a dangerous subspecies that cannot be destroyed

• new species can harm native organisms and damage the ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

NGSS.MS-LS2-2

Which factors are most important for the survival of hummingbirds during winter in a NEW environment?

• resources like nesting materials and sites, in order to produce offspring

• resources like flowering plants, trees, and insects, because food is needed first for survival

• resources like bodies of water, in order to stay hydrated

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

How do limiting factors (LF) affect ALL of the species within an ecosystem?

• species are all affected by LF because they live in the same ecosystem

• all of the consumer species are affected by the same LF because they have the same diet

• all species are affected by different LF because they all have different roles within the ecosystem

• no species are affected by the same LF because they all have different needs

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

How does the food web support the fact that all species within an ecosystem are affected by limiting factors?

• both the desert tortoise and the cottontail consume prickly pear cactus and yucca plants

• the coyote is limited by competition, and the kangaroo rat is limited by competition and predation

• the red-tailed hawk and the rattlesnake are both limited by competition for the same food resources

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which THREE examples correctly predict the effect of a change on the ecosystem? Choose all that apply.

• a decrease in predators will lead to an increase in prey

• a decrease in prey will lead to an increase in predators

• an increase in herbivores will lead to a decrease in plants

• an increase in the predator population will lead to an increase in the population of other predators in the ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Sea otters are a major keystone species in their ecosystem, but are often preyed upon by killer whales (orcas). In order to maintain a healthy population of sea otters, which solution is BEST, without harming the ecosystem?

• relocate killer whales from the Alaskan sea region to other regions without sea otters

• pass laws that prevent fishing of the food sources of killer whales and sea otters by humans

• cover kelp forests with fishing nets that prevent killer whales from moving into the kelp forests

• move sea otters to artificially created habitats where they can breed safely

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5