Name: 
 

EOC Practice Biodiversity



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 


Oak trees are native to temperate climates and have leaves.  Cacti are native to desert climates and have modified leaves called spines.
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How are the spines on a cactus different from the leaves on an oak tree?
a.
They reduce water loss.
c.
They provide heat exchange.
b.
They reduce oxygen release.
d.
They provide nutrient intake.
 

 2. 

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a.
Reproduction
c.
Conserving energy
b.
Catching prey
d.
Avoiding predators
 

 3. 

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a.
Water provides support from buoyancy for aquatic plants.
c.
Aquatic plants must ben due to water currents.
b.
Water reduces the gravity aquatic plants experience.
d.
Aquatic plants do not have a root system
 

 4. 

Marram grasses grow on dry sand dunes.  They have small leaves that roll inward to form a circle.  Water lilies grow on the surface water of ponds and lakes.  The water lilies have large, flat, broad leaves that float on the water’s surface.

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From studying the diagrams, which conclusion can be drawn about the adaptations of leaves to different environments?
a.
Leaves in wet habitats have a thicker epidermis covered with a waxy cuticle.
c.
Leaves in dry habitats have large air spaces and small vascular bundles.
b.
Leaves in dry habitats have sunken stomata to reduce rate of evaporation.
d.
leaves in wet habitats have all the stomata on the lower surface.
 

 5. 

Penguins live in the Antarctic.  They have small wings, webbed feet, streamlined bodies, mostly white feathers on their stomachs, and black feathers on their backs for heat absorption.  Penguins cannot fly but are excellent swimmers.  They are able to swim up to 15 mph underwater.
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Which characteristics play the greatest role in the penguin’s ability to be an excellent swimmer?
a.
Flipper-like wings and webbed feet
c.
Thick layer of skin and dark feathers
b.
Thick layer of skin and webbed feet
d.
Dark feathers and a thick layer of blubber
 

 6. 

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a.
Different flower characteristics increase competition of pollination with other plant species.
c.
Different flower characteristics reduce the chance of pollination by disease-carrying organisms.
b.
Different flower characteristics reduce the risk of cross pollination with other plant species.
d.
Different flower characteristics increase the chance of pollination by different means in the environment.
 

 7. 

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a.
Genetic variation
c.
Reproductive success
b.
Population isolation
d.
Environmental pressure
 

 8. 

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a.
There are likely many niches to occupy.
c.
There are likely limited chances for competition.
b.
There are likely many natural resources.
d.
There are likely limited numbers of predators.
 

 9. 

Many different factors influence the rate of evolution.  The table lists several factors affecting four populations.
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Which population most likely experiences the fastest rate of evolution?
a.
Population 1
c.
Population 3
b.
Population 2
d.
Population 4
 

 10. 

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a.
mutation
c.
natural selection selective breeding
b.
speciation
d.
selective breeding
 

 11. 

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a.
The lake could become vulnerable to invasive fish species that could  cause breeding between species and change the cycling of nutrients.
c.
There could be a stress-induced increase  in the mutation rate of the fish, causing a change in species interactions.
b.
There could be a change in nutrient and energy cycling, threatening  ecosystem health due to loss of biodiversity.
d.
The stability of the lake’s food web could be threatened because the fish drop one trophic level.
 

 12. 

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a.
They would change both food and nesting habits.
c.
Their diets would change to available plants.
b.
They would move to forests with young trees.
d.
Their population would decrease further.
 

 13. 


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a.
Strong ability to survive environmental change
c.
Low vulnerability to animal predation
b.
Wide range of usable energy resources
d.
Large variety of ecological roles
 

 14. 

The table shows a comparison of the amino acid sequence in the p53 protein from seven species.  The right column describes the percentages of amino acids within the sequence that are identical to the human sequence.

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How does the sequence of the amino acids show relatedness between organisms?

a.
A rabbit and a Rhesus monkey are more closely related than a dog and a chicken.
c.
A dog and a fish are more closely related than a dog is to a chicken.
b.
The fish are more closely related to a human than they are to a chicken.
d.
A chicken is more closely related to mammals than to a fish.
 

 15. 

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Which characteristic do domestic cats and lions share that separates them from the other animals?
a.
Hair and mammary Glands
c.
Retractable Claws
b.
Cheek Teeth for Eating Meat
d.
Ability to Purr
 

 16. 

A simplified evolutionary path of the whale is shown.
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Which is the best evidence to support the relationship of the modern whale to the immediate ancestor in the evolutionary path?
a.
the presence of a tail in the ancestral whale
c.
The observation that both animals live in the water
b.
The observation that both animals have teeth
d.
The presence of rudimentary hip bones in the whale
 

 17. 

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Which organism shares the least common ancestry with humans in the cytochrome c molecule?
a.
Turtle
c.
Bull Frog
b.
Kangaroo
d.
Rhesus Monkey
 

 18. 

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a.
Similar diet as shown by tooth comparisons
c.
Similar amino acids as shown by laboratory tests
b.
Similar habitat as shown by geographic location
d.
Similar physical structure as shown by fossil evidence
 

 19. 

Several plants and their scientific names are listed in the table.
mc019-1.jpg
Which plants are most closely related?
a.
Garlic and Ramps
c.
Sweet Gum and Red Oak
b.
Red Oak and Mulberry
d.
Sweetbay and Sweet Gum
 

 20. 

The diagram shows a phylogenetic tree for bacterial and archeal organisms.

mc020-1.jpg
What can be inferred from the phylogenetic tree?
a.
Proteobacteria and Spirochetes are closely related.
c.
Planctomyces and Methanococcus lack a common ancestor.
b.
Cyanobacteria and Gram-Positive bacteria evolved at the same time.
d.
Thermatoga and Thermoproteus are older species than Aquifax.
 

 21. 

the table shows the classification of five different animals.

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Which organism is most closely related to the fox?
a.
Beaver
c.
Rabbit
b.
Otter
d.
Shrew
 

 22. 

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Which characteristic indicates that Western gray squirrels have access to a more nutritious food supply?
a.
Adult weight
c.
Weaning Time
b.
Gestation Period
d.
Litters per Year
 

 23. 

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a.
Both communicate territorial boundaries.
c.
Both signal location of food
b.
Both warn about nearby danger.
d.
Both discourage predators.
 

 24. 

The porcupines and cacti have spines projecting from their bodies.
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What function do spines provide these organisms?
a.
Reduce water loss
c.
Enable predation
b.
Increase cooling
d.
Provide defense
 

 25. 

Rain forest trees and desert cacti have adaptations that enable their survival in these ecosystems.  Which adaptation in characteristic of many rain forest trees?
a.
Small leaves
c.
A deep root system
b.
Thorny stems
d.
A shallow root system
 

 26. 

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How does the structure of the bill most likely function in survival of the hummingbird?
a.
It uses the bill to balance while hovering.
c.
It uses the bill to attract other hummingbirds for mating.
b.
It uses the bill to peck holes in trees to find insects.
d.
It uses the bill to drink nectar from tube-shaped flowers.
 

 27. 

The fennec fox has large ear, thick sandy-colored fur, and lives in a desert environment.
mc027-1.jpg
What purpose does having large ears and sandy-colored fur provide for the fox’s survival in the dessert?
a.
Both provide camouflage.
c.
Both reduce loss of energy.
b.
Both decrease water loss.
d.
Both aid in regulating body temperature.
 

 28. 

ants have many body parts that each serve a special purpose.  The location of each body pert helps the ant function in its environment.  Why are the antennae of the ant located on the head?
a.
They are used for chewing.
c.
They are used for sensing.
b.
They are used for defense.
d.
They are used for movement.
 

 29. 

When a geographic barrier, such as the appearance of a canyon due to a large earthquake, splits a population, changes occur affecting the isolated members of the population.  Over a long period of time, these changes may lead to speciation.  The diagram illustrates this process.
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What most likely happened to the population on the north rim of the canyon after 20,000 years?
a.
Immigration of similar species occurred.
c.
Natural selection selected new traits in the population.
b.
Cross breeding with other species occurred.
d.
Recessive mutations caused the population to become extinct.
 

 30. 

A population of oak trees is severely reduced by a fungal disease.  Some trees are resistant to the disease and survive.  The surviving trees produce acorns with the more advantageous trait.  The survival and reproduction of these oak trees is an example of which mechanism of change?
a.
Mutation
c.
Natural selection
b.
Speciation
d.
Artificial selection
 

 31. 



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Which explanation best describes the observations from the experiment?
a.
The northern blue mussels have been unable to respond to green crabs.
c.
The Asian shore crabs have evolved a mechanism to prey on blue mussels with thicker shells.
b.
The green crabs are unable to respond to changes in the blue mussels with thicker shells.
d.
The southern blue mussels have developed a defense mechanism to respond to the Asian shore crabs.
 

 32. 

A population of mammal species is subjected to an extremely cold winter.  A portion of the population does not survive the harsh conditions.  Researchers identify a characteristic in the surviving species that enables them to store more fat than those that did not survive.  How will this change in population distribution affect the future species population?

a.
The population could continue to decrease because of a weakened gene poll.
c.
The population could continue to decrease if they experience extreme temperatures.
b.
The population will reproduce more offspring that have this insulating characteristic.
d.
The population will begin to compete for resources to increase insulation for upcoming winters.
 

 33. 

The Canadian province of Saskatchewan is located at high latitude, has no mountains or coasts, and receives little rainfall.  Scientists have concluded that organisms in Sakatchewan have a low ability to survive changes in their environmental conditions.  The latitude, topography, and rainfall of Saskatchewan have resulted in which property among organisms in Saskatchewan?
a.
High migration rate
c.
High mutation rate
b.
Low energy demand
d.
Low biodiversity
 

 34. 

The table shows the classification of several animals.  All of the animals are in phylum Arthropoda.
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Which two arthropods are most closely related?
a.
Animal 1 and Animal 3
c.
Animal 2 and Animal 4
b.
Animal 1 and Animal 5
d.
Animal 2 and Animal 3
 

 35. 

The table shows the classification of six different plants.

mc035-1.jpgWhich two plants are most closely related?
a.
Plant 1 and Plant 6
c.
Plant 3 and Plant 4
b.
Plant 2 and Plant 5
d.
Plant 1 and Plant 4
 



 
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