Question 1

Cytoplasmic extensions by which some protozoa move are

Accepted Answer

A) ciliA. 
B) flagella. 
C) pseudopodia. 
D) All answers are correct. 
E) pili. 
A) ciliA. 
B) flagella. 
C) pseudopodia. 
D) All answers are correct. 
E) pili.

Question 2

Clays often have positively charged surfaces.How may this have been important in the formation of organic macromolecules?

Accepted Answer

A) They are a source of ATP to run chemical reactions. 
B) They form covalent bonds with organic building blocks. 
C) They can form templates by binding organic building blocks. 
D) They are a source of oxygen to break down organic building blocks. 
E) They are formed from meteorites that carried organic molecules to Earth. 
A) They are a source of ATP to run chemical reactions. 
B) They form covalent bonds with organic building blocks. 
C) They can form templates by binding organic building blocks. 
D) They are a source of oxygen to break down organic building blocks. 
E) They are formed from meteorites that carried organic molecules to Earth.

Question 3

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

Accepted Answer

A) True 
 B)False

Question 4

A mushroom is a dikaryotic structure of Basidiomycota.

Accepted Answer

A) True 
 B)False

Question 5

A substance produced by brown algae that is used as an emulsifying and thickening agent in many foods and other products is

Accepted Answer

A) agar. 
B) red ooze. 
C) gelatin. 
D) carageenan. 
E) algin. 
A) agar. 
B) red ooze. 
C) gelatin. 
D) carageenan. 
E) algin.

Question 6

The region of a prokaryotic cell where the bacterial chromosome (DNA)is located in 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 7

Microscopic reproductive cells produced by most fungi are

Accepted Answer

A) hyphae. 
B) fruiting bodies. 
C) mycelia. 
D) gills. 
E) spores. 
A) hyphae. 
B) fruiting bodies. 
C) mycelia. 
D) gills. 
E) spores.

Question 8

The "endosymbiont theory" states that eukaryotic cells work together to form a multicellular organism.

Accepted Answer

A) True 
 B)False

Question 9

You are examining samples from a site in a dry pond that alternates between freezing cold winters and hot dry summers.When you find dormant thick-walled structures,you suspect that these are from bacteria and are

Accepted Answer

A) plasmids. 
B) pili. 
C) ribosomes. 
D) flagella. 
E) endospores. 
A) plasmids. 
B) pili. 
C) ribosomes. 
D) flagella. 
E) endospores.

Question 10

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 11

What was likely the first informational molecule of life?

Accepted Answer

A) carbohydrates 
B) lipids 
C) proteins 
D) RNA 
E) DNA 
A) carbohydrates 
B) lipids 
C) proteins 
D) RNA 
E) DNA

Question 12

Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen.They are considered

Accepted Answer

A) obligate anaerobes. 
B) phototrophs. 
C) facultative anaerobes. 
D) autotrophs. 
E) aerobic. 
A) obligate anaerobes. 
B) phototrophs. 
C) facultative anaerobes. 
D) autotrophs. 
E) aerobic.

Question 13

The endoplasmic reticulum,Golgi body,and other membranous organelles of cells might have formed by numerous infoldings of the cell's outer membrane.

Accepted Answer

A) True 
 B)False

Question 14

After a haploid spore germinates,it then completes mitosis,forming hyphae.The resulting hyphae are

Accepted Answer

A) diploid. 
B) dikaryotic. 
C) zygotes. 
D) gametes. 
E) haploid. 
A) diploid. 
B) dikaryotic. 
C) zygotes. 
D) gametes. 
E) haploid.

Question 15

Why do scientists hypothesize that RNA was the first form of genetic material?

Accepted Answer

A) All answers are correct. 
B) RNA can catalyze reactions. 
C) RNA can store genetic information. 
D) RNA can self-replicate. 
E) RNA can use genetic information to make proteins. 
A) All answers are correct. 
B) RNA can catalyze reactions. 
C) RNA can store genetic information. 
D) RNA can self-replicate. 
E) RNA can use genetic information to make proteins.

Question 16

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Accepted Answer

A) sex pili. 
B) flagella. 
C) endospores. 
D) calcium carbonate threads. 
E) cilia. 
A) sex pili. 
B) flagella. 
C) endospores. 
D) calcium carbonate threads. 
E) cilia.

Question 17

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 18

DNA that is separate and apart from the chromosome in a prokaryote is a(n)

Accepted Answer

A) ribosome. 
B) endospore. 
C) nucleus. 
D) nucleoiD. 
E) plasmid. 
A) ribosome. 
B) endospore. 
C) nucleus. 
D) nucleoiD. 
E) plasmid.

Question 19

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 20

A prokaryote that occupies a habitat that is extremely salty 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.

Exam 15: Evolution and Diversity of Microbial Life

Cytoplasmic extensions by which some protozoa move are

Clays often have positively charged surfaces.How may this have been important in the formation of organic macromolecules?

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

A mushroom is a dikaryotic structure of Basidiomycota.

A substance produced by brown algae that is used as an emulsifying and thickening agent in many foods and other products is

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

Microscopic reproductive cells produced by most fungi are

The "endosymbiont theory" states that eukaryotic cells work together to form a multicellular organism.

You are examining samples from a site in a dry pond that alternates between freezing cold winters and hot dry summers.When you find dormant thick-walled structures,you suspect that these are from bacteria and are

Which theory explains the origin of chloroplasts and mitochondria?

What was likely the first informational molecule of life?

Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen.They are considered

The endoplasmic reticulum,Golgi body,and other membranous organelles of cells might have formed by numerous infoldings of the cell's outer membrane.

After a haploid spore germinates,it then completes mitosis,forming hyphae.The resulting hyphae are

Why do scientists hypothesize that RNA was the first form of genetic material?

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Which protists produce much of the Earth's oxygen?

DNA that is separate and apart from the chromosome in a prokaryote is a(n)

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

A prokaryote that occupies a habitat that is extremely salty is a(n)

Scientific Study of Life

The Chemistry of Life

Cells

The Energy of Life

Photosynthesis

How Cells Release Energy

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 Respiratorysystems

The Digestive and Urinary Systems

The Immune System

Animal Reproduction and Development

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