AnswersFL-2000310-Biology 1Unit Test

Unit Test — Cumulative exam Answers

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1
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Which best describes the different modes of bacterial reproduction?

A
In genetic recombination, two new genetically identical cells are produced.
B
In conjugation, a special sex pilus is required to connect two bacterial cells.
C
In transduction, a bacterium exchanges a piece of its own DNA with another from the environment.
D
In transformation, bacterial DNA is transferred from one bacterium to another by a replicating virus.
2
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In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

A
Trilobites existed before jellyfish and ammonites.
B
Jellyfish existed before trilobites and ammonites.
C
Ammonites existed before trilobites and jellyfish.
D
Jellyfish, trilobites, and ammonites lived together.
3

Sublimation is the opposite of deposition just as evaporation is the opposite of

A
fusion
B
transpiration
C
freezing
D
condensation
4

Consider the cladogram.According to the cladogram, which characteristic was used to separate bony fish from amphibians?

Question illustration
A
jaws
B
cartilage
C
bony skeleton
D
lungs
5

A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?

A
The birds have similar body structure.
B
The birds have similar beaks.
C
The birds have different color variations.
D
The birds have different mating seasons.
6

A population of wolves in Wyoming experienced a rapid decline. Scientists found that 20 wolves died from rabies, 15 wolves died from mange (a parasitic mite), and 10 wolves died from natural causes. Wyoming experienced a recent drought, and many populations, including deer, bison, and bear, have diminished in the past year. What is best described in this scenario?

A
Wolves reached their greatest population growth.
B
Wolves were exposed to too many limiting factors.
C
Wolves were unaffected by other populations in Wyoming.
D
Wolves’ breeding season was affected by the drought.
7

Alzheimer's disease has some lifestyle factors because

A
everyone can contract it in their lifetime.
B
it can be influenced by nutritional choices.
C
up until now there is no known cure for it.
D
it can be contracted through germs.
8

A commercial on television advertises a new medicine that claims to boost immunity. You want to verify that the claim is scientifically based. Which source is least likely to provide you with accurate information about this new medicine?

A
a magazine about entertainment and lifestyle trends
B
the studies that the television ad cites
C
a brochure from the doctor’s office
D
the website of the governmental agency that tests health products
9

The tundra ecosystem of Alaska is known as a “cold desert.” It receives very little precipitation, about four inches annually. However, it is rich in wetlands due to permafrost, which traps moisture close to the surface. The temperatures vary widely, also producing persistent winds. Although treeless, the Arctic tundra is an abundant ecosystem. Many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. Which factor of the tundra ecosystem is biotic?

A
wind
B
dead bird
C
carbon dioxide
D
temperature
10

In 2011, the number of transplants in the United States was 26,745, and the number of donors was 14,146. What is most likely the reason that there were more transplants than donors?

A
The data that were used for comparison was not compatible.
B
The data were not recorded accurately.
C
There were retransplants done.
D
Each donor gave away more than one organ.
11

A feature in the early hominid was her apelike shoulders and forelimbs, but a pelvis that indicated that most of her body weight lay above her pelvis. Which best describes the fossil?

A
Scientists call her Wise Human and her apelike structure indicates a common ancestor to chimpanzees.
B
Scientists called her Lucy and her pelvis indicates she could walk upright.
C
Scientists call her Handy Human and her apelike structure indicates she could use tools like chimpanzees.
D
Scientists call her Upright Human because of the location of the pelvis.
12

Which level of biological classification is the lowest level that butterflies (invertebrates) and dogs (vertebrates) have in common?

A
domain
B
kingdom
C
species
D
family
13

Consider the group of giraffes in the image below.Which statement about the giraffes explains their evolution based on Charles Darwin’s main points?

Question illustration
A
The closest fossil ancestor to these giraffes would have a very short neck.
B
All three of the giraffes have an equal chance of reproducing regardless of the environment.
C
As a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment.
D
Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.
14

Along with Louis Pasteur, what other scientist helped to disprove spontaneous generation?

A
Eli Germ
B
John Snow
C
Francesco Redi
D
Robert Koch
15

What will happen to the frequency of the recessive allele for the HbS gene when there is an outbreak of malaria?

A
The frequency will increase.
B
The frequency will decrease.
C
The frequency will remain constant.
D
It is impossible to predict how the allele frequency will change.
E
The frequency will be cut in half with each generation.
16

How does conservation affect biodiversity?

A
It helps to preserve climate change.
B
It decreases species diversity.
C
It helps to preserve biodiversity.
D
It decreases ecosystem diversity.
17

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

Question illustration
A
segment A
B
segment B
C
segment C
D
segment D
18

Which of the following could result in secondary succession?

A
the formation of a tall sand dune on a previously grassy beach
B
a vast glacier in motion forming a U-shaped valley in its wake
C
a volcanic eruption that covers most of what used to be a forest
D
an introduced species that destroys all the native plants in an area
19

The diagram shows two water molecules. What does the dotted line between the water molecules represent?

Question illustration
A
a polar bond
B
a covalent bond
C
a hydrogen bond
D
an electronegative bond
20

Which is an example of temporal isolation?

A
flowers that bloom in different months
B
birds that have different mating calls
C
fruit flies that mate in different locations
D
squirrels that have different fur colors

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