Question 1

Endospores form

Accepted Answer

A) when the environmental conditions are favorable. 
B) during binary fission. 
C) as a means of genetic recombination. 
D) in response to adverse conditions. 
E) to produce two offspring from every one parental cell. 
A) when the environmental conditions are favorable. 
B) during binary fission. 
C) as a means of genetic recombination. 
D) in response to adverse conditions. 
E) to produce two offspring from every one parental cell. D

Question 2

The ________ resemble the ancestor of all animals.

Accepted Answer

A) choanoflagellates 
B) dinoflagellates 
C) amoeboflagellates 
D) euglenoids 
E) ciliates 
A) choanoflagellates 
B) dinoflagellates 
C) amoeboflagellates 
D) euglenoids 
E) ciliates A

Question 3

According to the old Linnaean scheme of classifying the living world into either animals or plants, any organism that could photosynthesize was considered a plant. What kingdoms in the new system contain photosynthetic organisms and what criteria are now used to group them?

Accepted Answer

Several forms of photosynthesis take place in Eubacteria and one (using rhodopsin) has been identified in Archaebacteria. These organisms are classified according to their structure (prokaryotic) and their biochemistry (lipids, cell wall materials, ribosomal components, etc.). A number of groups in the Protista have the capacity for photosynthesis, but very taxonomically different members have gained the ability by acquiring a photosynthetic endosymbiont. The organisms are therefore also classified by structure, biochemistry, and DNA sequence similarities. A complete answer would probably address the special characteristic of Chromista, and the unicellular motile groups (euglenoids and dinoflagellates).

Question 4

Scientists think diplomonads and amoeboflagellates are primitive and that their characteristics are similar to those of the first eukaryotic cells. What does this tell you about what the first eukaryotes were like and what kind of environment they might have inhabited?

Accepted Answer

Both these organisms are motile, have in

Question 5

The common human parasite Giardia lamblia

Accepted Answer

A) can cause diarrhea. 
B) is a bacterium. 
C) multiplies very slowly. 
D) uses pseudopodia for locomotion. 
E) is involved in many heart attacks. 
A) can cause diarrhea. 
B) is a bacterium. 
C) multiplies very slowly. 
D) uses pseudopodia for locomotion. 
E) is involved in many heart attacks.

Question 6

Prokaryotes differ from eukaryotes in that they

Accepted Answer

A) have flagella. 
B) lack DNA. 
C) have chloroplasts and mitochondria. 
D) lack a nuclear envelope. 
E) have cell walls. 
A) have flagella. 
B) lack DNA. 
C) have chloroplasts and mitochondria. 
D) lack a nuclear envelope. 
E) have cell walls.

Question 7

In viruses, the capsid

Accepted Answer

A) is composed of DNA or RNA. 
B) destroys the viral DNA or RNA. 
C) is never present. 
D) consists of many genes. 
E) may be involved in attachment of the virus. 
A) is composed of DNA or RNA. 
B) destroys the viral DNA or RNA. 
C) is never present. 
D) consists of many genes. 
E) may be involved in attachment of the virus.

Question 8

Most members of the domain Archaea are

Accepted Answer

A) found in common environments. 
B) strictly aerobic. 
C) anaerobes. 
D) very similar to complex eukaryotic cells. 
E) many-celled organisms. 
A) found in common environments. 
B) strictly aerobic. 
C) anaerobes. 
D) very similar to complex eukaryotic cells. 
E) many-celled organisms.

Question 9

What benefits do plant-eating animals receive from the bacteria that live in their guts?

Accepted Answer

The bacteria that live in the

Question 10

Match between columns
                        Premises: General term describing transfer of genetic material from one bacterium to another
Means by which bacteria reproduce
Genetic transfer between two bacteria involving cell to cell contact
Transfer of naked DNA from one bacterium into another
Requires a virus

Accepted Answer

The Answer of conjugation and binary fission and transduction and is...

Question 11

In bacteria, the cell wall is composed mainly of

Accepted Answer

A) peptidoglycans. 
B) lipids. 
C) glycoproteins. 
D) proteins. 
E) various polysaccharides. 
A) peptidoglycans. 
B) lipids. 
C) glycoproteins. 
D) proteins. 
E) various polysaccharides.

Question 12

Match between columns
                        Premises: Requires a virus
Means by which bacteria reproduce
Genetic transfer between two bacteria involving cell to cell contact
General term describing transfer of genetic material from one bacterium to another
Transfer of naked DNA from one bacterium into another

Accepted Answer

The Answer of conjugation and genetic recombination and transduction and is...

Question 13

Kelps are a form of what group of protists?

Accepted Answer

A) brown algae 
B) slime molds 
C) water molds 
D) ciliates 
E) dinoflagellates 
A) brown algae 
B) slime molds 
C) water molds 
D) ciliates 
E) dinoflagellates

Question 14

Mad cow disease is caused by an infectious protein, also known as a(n)

Accepted Answer

A) endospore. 
B) rickettsia. 
C) virion. 
D) prion. 
E) viroid. 
A) endospore. 
B) rickettsia. 
C) virion. 
D) prion. 
E) viroid.

Question 15

Rickettsias belong to which major group of bacteria?

Accepted Answer

A) proteobacteria 
B) cyanobacteria 
C) viruses 
D) Archaea 
E) spirochetes 
A) proteobacteria 
B) cyanobacteria 
C) viruses 
D) Archaea 
E) spirochetes

Question 16

The organism that causes malaria

Accepted Answer

A) is a multicellular protozoan. 
B) is the anopheles mosquito. 
C) attacks the protein globin in skin cells. 
D) is a single-celled protozoan. 
E) causes the overproduction of red blood cells. 
A) is a multicellular protozoan. 
B) is the anopheles mosquito. 
C) attacks the protein globin in skin cells. 
D) is a single-celled protozoan. 
E) causes the overproduction of red blood cells.

Question 17

Which of the following is not true of mycoplasmas?

Accepted Answer

A) They are the smallest truly living organisms. 
B) They are members of the domain Bacteria. 
C) They only inhabit multicelled organisms. 
D) Although classified as gram-positive, they lack cell wall. 
E) They can be pathogenic, causing pneumonia and urinary tract infections. 
A) They are the smallest truly living organisms. 
B) They are members of the domain Bacteria. 
C) They only inhabit multicelled organisms. 
D) Although classified as gram-positive, they lack cell wall. 
E) They can be pathogenic, causing pneumonia and urinary tract infections.

Question 18

Match between columns
                        Premises: Have thick peptidoglycan cell walls
Known only from isolated rRNA genes
Tolerateextreme concentrations of salt
Includesforms ancestral tomitochondria
Generate OS1U1B12S1U1B0 during photosynthesis

Accepted Answer

The Answer of Euryarcheota of the Archaea and Korarchasota of is...

Question 19

Most bacteria are

Accepted Answer

A) symbionts. 
B) heterotrophs. 
C) chemoautotrophs. 
D) photoautotrophs. 
E) microbial predators. 
A) symbionts. 
B) heterotrophs. 
C) chemoautotrophs. 
D) photoautotrophs. 
E) microbial predators.

Question 20

When a person visits the doctor with a bacterial infection, one of the first lab tests on the patient will tell the doctor whether the bacteria are gram-negative or gram-positive. Why is this important information for a doctor to have before deciding on treatment?

Accepted Answer

Gram-negative and gram-positive bacteria

Exam 11: Single-Celled Life

Endospores form

The ________ resemble the ancestor of all animals.

According to the old Linnaean scheme of classifying the living world into either animals or plants, any organism that could photosynthesize was considered a plant. What kingdoms in the new system contain photosynthetic organisms and what criteria are now used to group them?

Scientists think diplomonads and amoeboflagellates are primitive and that their characteristics are similar to those of the first eukaryotic cells. What does this tell you about what the first eukaryotes were like and what kind of environment they might have inhabited?

The common human parasite Giardia lamblia

Prokaryotes differ from eukaryotes in that they

In viruses, the capsid

Most members of the domain Archaea are

What benefits do plant-eating animals receive from the bacteria that live in their guts?

In bacteria, the cell wall is composed mainly of

Kelps are a form of what group of protists?

Mad cow disease is caused by an infectious protein, also known as a(n)

Rickettsias belong to which major group of bacteria?

The organism that causes malaria

Which of the following is not true of mycoplasmas?

Most bacteria are

When a person visits the doctor with a bacterial infection, one of the first lab tests on the patient will tell the doctor whether the bacteria are gram-negative or gram-positive. Why is this important information for a doctor to have before deciding on treatment?

What Is Life

Cells and the Chemistry of Life

How Cells Take in and Use Energy

The Cell Cycle

Patterns of Inheritance

DNA: The Thread of Life

Genes, Proteins, and Genetic Engineering

Reproduction and Development

The Mechanisms of Evolution

Lifes Origins and Biodiversity

Fungi and Plants: Decomposers and Producers

The Evolution and Diversity of Animals

Ecology of Populations and Communities

Ecosystems and the Biosphere

Body Function, Survival, and the Steady State

Circulation and Respiration

Defense Against Disease

Animal Nutrition and Digestion

Hormones: Messengers of Change

The Nervous System

The Body in Motion

Plant Architecture and Function

Plant Growth, Hormones, and Engineering

The Dynamic Plant

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