Question 1

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",endophyte spores were sprayed on the cacao leaves.Which of the following is true of the spores?

Accepted Answer

A)  They undergo meiosis.
B)  They are produced only by fungi.
C)  Within fungi,they are produced only by endophytes.
D)  They are haploiD.
E)  They are not cells.F) B) and E)
G) D) and E)

Question 2

A protist is defined as

Accepted Answer

A)  mostly multicellular eukaryotes that obtain food by external digestion.
B)  entirely multicellular eukaryotes that obtain food by ingestion.
C)  mostly multicellular eukaryotes that obtain food by photosynthesis.
D)  mostly unicellular eukaryotes that obtain food by photosynthesis.
E)  eukaryotic organisms that are not plants,fungi,nor animals.F) A) and B)
G) A) and C)

Question 3

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)  uniploidF) A) and E)
G) A) and D)

Question 4

The Irish potato famine in the mid 1840s was caused by which heterotrophic protist decomposer that secreted digestive enzymes onto potatoes?

Accepted Answer

A)  a water mold
B)  a red alga
C)  a dinoflagellate
D)  a protozoan
E)  a fungusF) A) and B)
G) B) and E)

Question 5

In a fungus,aggregated hyphae form specialized spore-producing organs called

Accepted Answer

A)  myceliA.
B)  fruiting bodies.
C)  sporophytes.
D)  hyphae.
E)  gills.F) A) and C)
G) A) and B)

Question 6

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Accepted Answer

A)  Membranes are used by cells to catalyze reactions.
B)  Membranes are used by cells to store genetic information.
C)  Membranes protect a cell from high temperatures and pressures in the environment.
D)  Membranes are used by cells to isolate their contents from the environment.
E)  Membranes protect a cell from gases in the atmosphereF) A) and C)
G) A) and E)

Question 7

Chloroplasts and mitochondria have small,circular chromosomes,which supports the endosymbiont theory that they arose from which of the following?

Accepted Answer

A)  viruses
B)  other eukaryotic cells
C)  bacteria
D)  naked DNA
E)  protistsF) B) and E)
G) A) and D)

Question 8

The Russian chemist Oparin suggested that for organic molecules to form on Earth,the atmosphere was probably rich in all of these EXCEPT

Accepted Answer

A)  oxygen.
B)  water.
C)  ammonia.
D)  methane.
E)  hydrogen.F) D) and E)
G) A) and E)

Question 9

Chloroplasts in algae probably arose from which source?

Accepted Answer

A)  cyanobacteria
B)  aerobic bacteria
C)  anaerobic bacteria
D)  photosynthetic viruses
E)  aerobic fungiF) None of the above
G) A) and B)

Question 10

What was likely the first informational molecule of life?

Accepted Answer

A)  carbohydrates
B)  lipids
C)  proteins
D)  RNA
E)  DNAF) All of the above
G) A) and E)

Question 11

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",why were some leaves on a cacao plant treated with endophytes and others not?

Accepted Answer

A)  as a control for variation between plants
B)  to reduce the number of plants that were needed
C)  to reduce the amount of endophyte spores that were needed
D)  to keep the Phytophthora from spreading to other plants
E)  The endophytes were able to spread from one leaf to another.F) A) and E)
G) A) and D)

Question 12

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.F) A) and C)
G) A) and E)

Question 13

Scientists have fossils of the first life on Earth.

Accepted Answer

A) True 
 B)False

Question 14

Streptomyces are obligate aerobic soil bacteria that infect may root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Accepted Answer

A) True 
 B)False

Question 15

Malaria is caused by Plasmodium falciparum,a non-motile protist that contains a cluster of microtubules at one end of the cell.Once injected into the bloodstream,these microtubules are used to attach to red blood cells.In areas of the world where malaria is endemic,people have a relatively high incidence of the allele for

Accepted Answer

A)  sickle cell.
B)  blue eyes.
C)  cystic fibrosis.
D)  mental retardation.
E)  hemophilia.F) A) and E)
G) B) and C)

Question 16

In the ecosystems of the world,fungi act primarily as

Accepted Answer

A)  decomposers.
B)  autotrophs.
C)  primary consumers.
D)  secondary consumers.
E)  photosynthesizers.F) None of the above
G) B) and C)

Question 17

Some protozoa move using false feet called

Accepted Answer

A)  flagellA.
B)  pseudopodia.
C)  cilia.
D)  antennae.
E)  spikes.F) A) and B)
G) B) and E)

Question 18

How did the first life on Earth lead to the diversity of organisms on Earth today?

Accepted Answer

A)  evolution
B)  asexual reproduction
C)  extinction
D)  All answers are correct.
E)  stasis of the evironmentF) C) and D)
G) B) and E)

Question 19

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.F) B) and E)
G) A) and B)

Question 20

Many prokaryotes play vital roles in global nutrient cycles.

Accepted Answer

A) True 
 B)False

Exam 15: Evolution and Diversity of Microbial Life

Chloroplasts and mitochondria have small,circular chromosomes,which supports the endosymbiont theory that they arose from which of the following?

Correct Answer
verified

Chloroplasts in algae probably arose from which source?

Correct Answer
verified

A protist is defined as

Correct Answer
verified

In the ecosystems of the world,fungi act primarily as

Correct Answer
verified

How did multicellular organisms evolve from unicellular organisms?

Correct Answer
verified

Some protozoa move using false feet called

Correct Answer
verified

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

Correct Answer
verified

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Correct Answer
verified

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",why were some leaves on a cacao plant treated with endophytes and others not?

Correct Answer
verified

What was likely the first informational molecule of life?

Correct Answer
verified

Correct Answer
verified

How did the first life on Earth lead to the diversity of organisms on Earth today?

Correct Answer
verified

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",endophyte spores were sprayed on the cacao leaves.Which of the following is true of the spores?

Correct Answer
verified

In a fungus,aggregated hyphae form specialized spore-producing organs called

Correct Answer
verified

Scientists have fossils of the first life on Earth.

Correct Answer
verified

The Irish potato famine in the mid 1840s was caused by which heterotrophic protist decomposer that secreted digestive enzymes onto potatoes?

Correct Answer
verified

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?

Correct Answer
verified

Streptomyces are obligate aerobic soil bacteria that infect may root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Correct Answer
verified

Many prokaryotes play vital roles in global nutrient cycles.

Correct Answer
verified

The Russian chemist Oparin suggested that for organic molecules to form on Earth,the atmosphere was probably rich in all of these EXCEPT

Correct Answer
verified

Exam 15: Evolution and Diversity of Microbial Life

Chloroplasts and mitochondria have small,circular chromosomes,which supports the endosymbiont theory that they arose from which of the following?

Correct AnswerverifiedShow Answer

Chloroplasts in algae probably arose from which source?

Correct AnswerverifiedShow Answer

A protist is defined as

Correct AnswerverifiedShow Answer

In the ecosystems of the world,fungi act primarily as

Correct AnswerverifiedShow Answer

How did multicellular organisms evolve from unicellular organisms?

Correct AnswerverifiedShow Answer

Some protozoa move using false feet called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",why were some leaves on a cacao plant treated with endophytes and others not?

Correct AnswerverifiedShow Answer

What was likely the first informational molecule of life?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

How did the first life on Earth lead to the diversity of organisms on Earth today?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",endophyte spores were sprayed on the cacao leaves.Which of the following is true of the spores?

Correct AnswerverifiedShow Answer

In a fungus,aggregated hyphae form specialized spore-producing organs called

Correct AnswerverifiedShow Answer

Scientists have fossils of the first life on Earth.

Correct AnswerverifiedShow Answer

The Irish potato famine in the mid 1840s was caused by which heterotrophic protist decomposer that secreted digestive enzymes onto potatoes?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Streptomyces are obligate aerobic soil bacteria that infect may root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Correct AnswerverifiedShow Answer

Many prokaryotes play vital roles in global nutrient cycles.

Correct AnswerverifiedShow Answer

The Russian chemist Oparin suggested that for organic molecules to form on Earth,the atmosphere was probably rich in all of these EXCEPT

Correct AnswerverifiedShow Answer

Correct Answer
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