Question 1

The region of a prokaryotic cell where the bacterial chromosome (DNA)is located is the

Accepted Answer

A)  cell membrane. 
B)  nucleus. 
C)  cell wall. 
D)  nucleoid. 
E)  ribosome. 
A)  cell membrane. 
B)  nucleus. 
C)  cell wall. 
D)  nucleoid. 
E)  ribosome.

Question 2

The first life on Earth was probably most similar to modern-day

Accepted Answer

A)  bacteria. 
B)  protists. 
C)  Archaeans. 
D)  plants. 
E)  fungi. 
A)  bacteria. 
B)  protists. 
C)  Archaeans. 
D)  plants. 
E)  fungi.

Question 3

In fungi,a mass of aggregated hyphae is called a(n)

Accepted Answer

A)  mycelium. 
B)  pilus. 
C)  gill. 
D)  spore. 
E)  ascus. 
A)  mycelium. 
B)  pilus. 
C)  gill. 
D)  spore. 
E)  ascus.

Question 4

Which protists produce much of the Earth's oxygen?

Accepted Answer

A)  amoeba 
B)  slime molds 
C)  algae 
D)  protozoa 
E)  radiolarians 
A)  amoeba 
B)  slime molds 
C)  algae 
D)  protozoa 
E)  radiolarians

Question 5

How did multicellular organisms evolve from unicellular organisms?

Accepted Answer

A)  Single-celled organisms joined together, or failed to separate after cell division. 
B)  Single-celled organisms joined together only. 
C)  Single-celled organisms failed to separate after cell division only. 
D)  Single-celled organisms joined together, or absorbed other species by endosymbiosis. 
E)  One species absorbed another species by endosymbiosis only. 
A)  Single-celled organisms joined together, or failed to separate after cell division. 
B)  Single-celled organisms joined together only. 
C)  Single-celled organisms failed to separate after cell division only. 
D)  Single-celled organisms joined together, or absorbed other species by endosymbiosis. 
E)  One species absorbed another species by endosymbiosis only.

Question 6

Protists can be autotrophs.

Accepted Answer

A) True 
 B)False

Question 7

If a friend at the next lab bench was working on an unknown fungus and shouted "I've found zygospores," you would tell your friend that the fungus was probably a member of the

Accepted Answer

A)  Chytridiomycota. 
B)  Ascomycota. 
C)  Zygomycota. 
D)  Basidiomycota. 
E)  Glomeromycota. 
A)  Chytridiomycota. 
B)  Ascomycota. 
C)  Zygomycota. 
D)  Basidiomycota. 
E)  Glomeromycota.

Question 8

All protists

Accepted Answer

A)  are prokaryotes. 
B)  lack a nucleus. 
C)  lack membrane-bounded organelles. 
D)  are eukaryotes. 
E)  are multicellular. 
A)  are prokaryotes. 
B)  lack a nucleus. 
C)  lack membrane-bounded organelles. 
D)  are eukaryotes. 
E)  are multicellular.

Question 9

Fungi are classified into phyla based on which characteristic?

Accepted Answer

A)  organelles 
B)  composition of cell wall 
C)  photosynthesis 
D)  reproductive structures 
E)  multicellular vs. unicellular 
A)  organelles 
B)  composition of cell wall 
C)  photosynthesis 
D)  reproductive structures 
E)  multicellular vs. unicellular

Question 10

A prokaryote that occupies a habitat that is characterized by extreme heat (above 50°C)is a(n)

Accepted Answer

A)  thermophile. 
B)  acidophile. 
C)  halophile. 
D)  basophile. 
E)  hydrophile. 
A)  thermophile. 
B)  acidophile. 
C)  halophile. 
D)  basophile. 
E)  hydrophile.

Question 11

Dictyostelium discoideum consists of amoeba-like cells that move independently,feeding on bacteria.When the food runs out,cells begin to aggregate to produce spores.Dictyostelium discoideum is which kind of organism?

Accepted Answer

A)  an autotroph 
B)  a heterotroph and autotroph 
C)  a heterotroph 
D)  a detritovore 
E)  a heterotroph and detritovore 
A)  an autotroph 
B)  a heterotroph and autotroph 
C)  a heterotroph 
D)  a detritovore 
E)  a heterotroph and detritovore

Question 12

A jellylike substance produced by red algae and used as a culture medium for microorganisms is

Accepted Answer

A)  red ooze. 
B)  All answers are correct. 
C)  gelatin. 
D)  agar. 
E)  algin. 
A)  red ooze. 
B)  All answers are correct. 
C)  gelatin. 
D)  agar. 
E)  algin.

Question 13

Yeasts are

Accepted Answer

A)  multicelled autotrophs. 
B)  single-celled heterotrophs. 
C)  single-celled autotrophs. 
D)  multicelled heterotrophs. 
E)  All answers are correct. 
A)  multicelled autotrophs. 
B)  single-celled heterotrophs. 
C)  single-celled autotrophs. 
D)  multicelled heterotrophs. 
E)  All answers are correct.

Question 14

Silica walls are a characteristic of

Accepted Answer

A)  diatoms. 
B)  euglenoids. 
C)  red algae. 
D)  brown algae. 
E)  slime molds. 
A)  diatoms. 
B)  euglenoids. 
C)  red algae. 
D)  brown algae. 
E)  slime molds.

Question 15

In setting up a lab for a general biology course,you are asked to match labels with a timeline on the wall.For "First Cells," you need to find a point on the timeline

Accepted Answer

A)  500 million years ago. 
B)  1.2 billion years ago. 
C)  two billion years ago. 
D)  six billion years ago. 
E)  four billion years ago. 
A)  500 million years ago. 
B)  1.2 billion years ago. 
C)  two billion years ago. 
D)  six billion years ago. 
E)  four billion years ago.

Question 16

Which theory explains the origin of chloroplasts and mitochondria?

Accepted Answer

A)  the theory of evolution 
B)  the theory of natural selection 
C)  the geologic time theory 
D)  the cell theory 
E)  the endosymbiont theory 
A)  the theory of evolution 
B)  the theory of natural selection 
C)  the geologic time theory 
D)  the cell theory 
E)  the endosymbiont theory

Question 17

How did the first life on Earth obtain energy?

Accepted Answer

A)  photosynthesis in the presence of oxygen 
B)  photosynthesis in the absence of oxygen 
C)  heterotrophic consumption of organic molecules 
D)  autotrophic consumption of organic molecules 
E)  phototrophic consumption of inorganic molecules 
A)  photosynthesis in the presence of oxygen 
B)  photosynthesis in the absence of oxygen 
C)  heterotrophic consumption of organic molecules 
D)  autotrophic consumption of organic molecules 
E)  phototrophic consumption of inorganic molecules

Question 18

Sexual spores are formed by the fusion of two haploid nuclei.They then go through meiosis to form spores.Spores are which of the following?

Accepted Answer

A)  haploid 
B)  diploid 
C)  dikaryotic 
D)  tetraploid 
E)  uniploid 
A)  haploid 
B)  diploid 
C)  dikaryotic 
D)  tetraploid 
E)  uniploid

Question 19

Which of the following was not a characteristic of the Hadean eon?

Accepted Answer

A)  volcanic eruptions and earthquakes 
B)  prokaryotic life appeared at the end of this eon 
C)  ultraviolet radiation 
D)  large amounts of comets and meteorites 
E)  photosynthetic organisms were abundant 
A)  volcanic eruptions and earthquakes 
B)  prokaryotic life appeared at the end of this eon 
C)  ultraviolet radiation 
D)  large amounts of comets and meteorites 
E)  photosynthetic organisms were abundant

Question 20

Autotrophs must acquire carbon from organic molecules produced from other organisms.

Accepted Answer

A) True 
 B)False

Exam 15: Evolution and Diversity of Microbial Life

The region of a prokaryotic cell where the bacterial chromosome (DNA)is located is the

The first life on Earth was probably most similar to modern-day

In fungi,a mass of aggregated hyphae is called a(n)

Which protists produce much of the Earth's oxygen?

How did multicellular organisms evolve from unicellular organisms?

Protists can be autotrophs.

If a friend at the next lab bench was working on an unknown fungus and shouted "I've found zygospores," you would tell your friend that the fungus was probably a member of the

All protists

Fungi are classified into phyla based on which characteristic?

A prokaryote that occupies a habitat that is characterized by extreme heat (above 50°C)is a(n)

Dictyostelium discoideum consists of amoeba-like cells that move independently,feeding on bacteria.When the food runs out,cells begin to aggregate to produce spores.Dictyostelium discoideum is which kind of organism?

A jellylike substance produced by red algae and used as a culture medium for microorganisms is

Yeasts are

Silica walls are a characteristic of

In setting up a lab for a general biology course,you are asked to match labels with a timeline on the wall.For "First Cells," you need to find a point on the timeline

Which theory explains the origin of chloroplasts and mitochondria?

How did the first life on Earth obtain energy?

Sexual spores are formed by the fusion of two haploid nuclei.They then go through meiosis to form spores.Spores are which of the following?

Which of the following was not a characteristic of the Hadean eon?

Autotrophs must acquire carbon from organic molecules produced from other organisms.

The Scientific Study of Life

The Chemistry of Life

Cells

The Energy of Life

Photosynthesis

Respiration and Fermentation

DNA Structure and Gene Function

DNA Replication,Binary Fission,and Mitosis

Sexual Reproduction and Meiosis

Patterns of Inheritance

DNA Technology

Forces of Evolutionary Change

Evidence of Evolution

Speciation and Extinction

Evolution and Diversity of Plants

Evolution and Diversity of Animals

Populations

Communities and Ecosystems

Preserving Biodiversity

Plant Form and Function

Reproduction and Development of Flowering Plants

Animal Tissues and Organ Systems

The Nervous System and the Senses

The Endocrine System

The Skeletal and Muscular Systems

The Circulatory and Respiratory Systems

The Digestive and Urinary Systems

The Immune System

Animal Reproduction and Development

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