Pathogens are divided into five classes: bacteria, fungi , parasites , viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

Diagram of check cell under low power and high power

a couple in which the father has the a blood type and the mother has the o blood type produce an offspring with the o blood type, how does this happen? how could two functionally O parents produce an offspring that has the a blood type?

What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of these

Answer 2

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Answer 6

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Answer 7

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Answer 8

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.