Answers FL-2000310-Biology 1 BUnit Test

Unit Test Answers

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Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.

The dwindling zebra population has led to the decline of the predator lion and cheetah populations.

Overhunting of lion and cheetah populations has led to a decline in the food source population.

Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.

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Which of the following did not allow researchers to further explore below the ocean’s surface?a.ROV’sb.Alvinc.Palomaresd.Bathysphere

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What would happen to the size of the carnivore population if the herbivore population increased?

decrease

increase

die off

stay the same

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A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf's skull back to Florida. Which law is the hunter violating?

the National Park System Act

the Lacey Act

EPA

CITES

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What is the difference between food chains and food webs?

Food webs show the flow of energy from producers to consumers, and food chains show the flow of energy from consumers to producers.

Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.

About ten percent of the energy is passed on to the next trophic level in food webs, but in food chains, about ninety percent is passed on to the next trophic level.

Heat is lost when energy is passed on to the next trophic level in food chains, but in food webs, heat is not lost when energy is passed on to the next trophic level.

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Ash trees are being removed when they show signs of the ash borer, a parasite that affects only ash trees and kills them off. What best explains why the ash trees are being cut down?

The ash borer is a density-independent limiting factor, and humans need to clear cut to control tree density.

The ash borer is a density-dependent limiting factor and will start to spread to nearby healthy trees.

Ash trees are outcompeting other trees and are thus more affected by the ash borer.

Changes in climate have decreased ash borer populations which indirectly increased the need for cutting down the trees.

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White perch is a fish that is native to Atlantic coastal regions and is invasive to the Great Lakes. It feeds on native species and is thought to be the cause of the decline of the Great Lakes walleye fish populations. What was most likely its mode of introduction?

produce brought from the eastern states

trapped in a ship's ballast or a water tank

trapped in a cargo crate carrying nonperishable items

luggage brought in an overseas flight

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Which describes a way in which phosphorus may enter into the phosphorus cycle?

Earthquakes release phosphorus.

Phosphorus is carried in the rain that was evaporated from lakes.

Human use of fertilizers release phosphorus into the groundwater.

Phosphorus is transpired from the leaves of plants.

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Which best describes how an organism’s niche is determined?

An organism's habitat and inherited traits determine its niche by influencing how it interacts with the environment and other organisms.

An organism’s reproductive rate and population size determine its niche in an ecosystem.

An organism's physical size and strength determine its niche by helping it dominate other species.

An organism's location and prey determine its nice, regardless of its behaviors or traits.

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A group of environmentalists was discussing the benefits and drawbacks associated with using fossil fuels. Which argument best fits the conversation?

Fossil fuels are cheaper than alternative forms of energy.

Fossil fuel reserves will never be depleted.

Fossil fuels are easily renewed.

Fossil fuel use does not affect the environment.

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Consider the following data. Rates for Cheetah Population from 2011 to 2012Cause of change20112012Deaths21Births54Immigration 61Emigration83Which would have to happen to keep the population growth of cheetahs in 2013 the same the previous years?

4 deaths, 7 births, 2 immigration, 6 emigration

3 deaths, 6 births, 5 immigration, 7 emigration

5 deaths, 2 births, 8 immigration, 3 emigration

1 deaths, 5 births, 3 immigration, 7 emigration

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What kind of display would be the best way to represent the data below?Type of speciesCritically endangered (%)Endangered or vulnerable (%)Plants1370Invertebrates035Freshwater fish937Amphibians730Reptiles528Birds012Mammals221

bar graph

pie chart

line graph

scatter plot

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Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and bobcats. Which of the following is a limiting factor for a ground squirrel population?

a population of tree squirrels

a population of hawks

genetic variability

breeding season

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Which determines carrying capacity?

logistic factors

exponential growth

population growth

limiting factors

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The marine biome _______.a.is a large ecosystem, but not larger than some terrestrial ecosystemsb.is characterized by four different zonesc.has little species diversityd.covers a small portion of the Earth’s surface

The burrowing owl is found in dry, open areas such as grasslands, prairies, savannas, deserts, farmlands, golf courses, and urban areas throughout most of western United States and Florida, Central America, and most of South America. It makes its home in burrows of other animals and primarily eats insects and small rodents. As humans build more cities, nearby burrowing owl habitats change due to destruction of burrows and loss of prey. Which is the least likely outcome of the habitat changes that are described?

The niche of the burrowing owl may change as it adapts to the changes.

The niche of the burrowing owl may change as it moves to a new habitat.

The population of the burrowing owl may be reduced or even become extinct.

The population of the burrowing owl may increase in its new surroundings.

Which of the following adaptations is typical of marine mammals?a.thick layer of blubberb.body covered in thick furc.webbed hands and feetd.breathing apparatus on the sides of the head

Interactions between organisms and their environment impact the organism’s overall population. The jaguar Panthera onca is the largest cat in North America. It is found in areas across the Southwest, including Arizona, New Mexico, and Texas. It is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, and many smaller mammals. Which shows the relationship between the jaguar and turtles?

adaptation principle

competitive exclusion principle

niche principle

predator-prey relationship

A trout population grew from 4 in 1992 to 16 in 1993 and then to 64 in 1994. If it continued to grow exponentially, approximately how many trout were there in 1995?

100

128

256

320

Which best describes what is occurring in this population of squirrels?Number of Squirrels Entering and Leaving a Population after 1 YearCause of changeNumber of squirrelsDied from predation2Born4Immigration10Left to find food3Died from disease8Left to find a mate3

Population growth is decreasing.

Population growth is increasing.

Population growth stays the same.

Population reaches carrying capacity.

The map shows the distribution of wild boars in the United States (shaded area). Which of these facts about wild boars is best supported by the evidence provided?

Wild boars were brought to the United States by humans.

Wild boars have quickly spread through the United States.

Wild boars have established successfully mostly in areas with warm climates.

Wild boars have a high reproductive rate and no natural predators.

Review the picture below.Which would be the most accurate title for this picture?

primary succession after a controlled fire

primary succession after a volcanic eruption

secondary succession after a controlled fire

secondary succession after a volcanic eruption

What best describes the association between the carbon cycle, plants, and animals?

Plants fix carbon and release oxygen, and animals release carbon and use oxygen.

Animals fix carbon and release oxygen, and plants release carbon and use oxygen.

Animals fix carbon through respiration, and plants fix carbon through photosynthesis.

Plants decompose fixing carbon, and animals decompose releasing carbon.

Which molecule would be the most affected by limited nitrogen?

myofibrillar proteins in muscle

glucose molecules in starch

fat molecules surrounding organs

cellulose molecules in plant cell walls

An ecosystem has experienced a flood. Which type of plants would you expect to see growing first after the flood?

shrubs

lichen

small annual plants

pine and oak trees

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