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WorksheetsEcosystem Interactions Test Review
Total questions: 13
Worksheet time: 7mins
A trait that helps an organism survive and reproduce is called a(n) ______________?
Mutation
selection
adaptation
variation
A research team wated to produce a smaller variety of German shepherd dogs. They mated the smallest dogs from different litters for severals generations.
This is an example of which concept?
extinction
mutation
selective breeding
natural selection
The number of different species in an area is referred to as its _____________-.
niche diversity
climate
habitat fragmentation
biodiversity
The diagram shows how modern types of flowers developed from early types of flowers over the last 75 million years.
Which is the most likely reason why these early flowers gradually changed to many different types of flowers over time?
The flowers' traits were genetically engineered.
The environments of the flowers stayed the same.
The genetic material of the flowers stayed the same.
The flowers adapted to the environmental conditions.
A change in the animal's DNA, leading to a variation of a species, is called ___________.
a mutation
an infection
selective breeding
sexual reproduction
Darwin concluded that organisms on the Galapagos Islands __________.
had changed over time.
had remained the same.
were the result of selective breeding.
had no variations.
The loss of a natural habitat is called __________.
habitat destruction.
habitat fragmentation.
pollution.
poaching.
Which statement best exemplifies the biodiversity of an ecosystem?
A small pond has about 1,300 organisms and 26 different species living in it.
A desert receives some rainfall, which supports several species of plants.
A small forest supports a population of 35 elephants.
A pond is home to animals that are able to live in the polluted water.
Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?
natural selection
overproduction
competitio
variation
Elephants are valued by some people because their tusks are made of ivory. Although it is illegal, people kill elephants, take the ivory, and sell it to make a variety of objects like jewelry and sculptures.
This activity is an example of which threat to biodiversity?
poaching
habitat destruction
pollution
nonnative species
The diagram shows the head structures of four different birds.
The birds' beaks show how the birds ______________/
compete for the same food in their community.
are adapted to get food from different sources.
require different amounts of food for survival.
store food for the winter months.
Which factors tend to promote higher biodiversity in an ecosystem? Check all that apply.
Low rainfall
diversity of niches
short growing seasons
large area
warm climate
The diagram shows a population of adult giraffes over time. Letters A, B, and C represent three time periods.
Which process does this diagram best represent?
ecological succession
genetic engineering
natural selection
asexual reproduction
