Unit Test — Unit test Answers

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

Variation of ecological habitats within a species is characteristic of which type of diversity?a.Genetic diversityb.Ecosystem diversityc.Species diversityd.Regional diversity

Organisms that have a physical trait that makes it easier for them to access food supplies are unlikely to pass on that trait to their offspring.

The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?a.Mutualismb.Commensalismc.Parasitismd.Competition

What discovery led Darwin to develop his theories on adaptation?a.The Galapagos islands contain a range of habitats.b.The Galapagos islands originate from volcanoes.c.The birds Darwin found in the Galapagos were different types of finches, not separate types of birds.d.Many of the organisms in the Galapagos lived in hostile environments.

How can an increase in biodiversity lead to an increase in ecosystem stability?a.A more biodiverse ecosystem is not subject to change.b.A more biodiverse ecosystem has a higher chance of adapting to species changes.c.A more biodiverse ecosystem has fewer species types to balance.d.A more biodiverse ecosystem is subject to fewer natural disasters.

Which of the following is not a part of Darwin’s theory of evolution?a.Changes in organisms occur immediately.b.Organisms change over time.c.Species evolution occurs through natural selection.d.Organisms developed from common ancestors.

Deer run in zigzag patterns when being chased by predators. What type of adaptation is this?a.Behavioralb.Physiologicalc.Structurald.Ecological

What are the five categories of adaptations?

Which of the following could result in secondary succession?

What is the purpose of hibernation?

A conservation biologist has determined the status of the ecosystems in a protected area, as shown in the table below. Based on the table, which part of the pie chart represents secondary succession?Status of ecosystemsPercentage of protected areaPrimary succession10Secondary succession30Barren land5Established community55

Sponges produce structures called gemmules, which are hard outer coatings protecting a reproductive bud during times of drought. What type of adaptation is this?a.Biochemicalb.Ecologicalc.Structurald.Physiological

The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.

Which of the following is an example of symbiosis?a.barnacles living on a whale’s skinb.a tree obtaining nutrients from the soilc.phytoplankton absorbing the sun’s raysd.a blue whale feeding on zooplankton