Koch’s postulates and design the study using Koch’s postulates to test the hypothesis that chytrid infections are responsible for the frog deaths. Introduction: Koch’s postulates state that the microorganism must be present in all the diseased individuals, but it must be absent in the healthy organism. The table mentioning that the chytrids are responsible for massive die-offs occurring in amphibians is given below: Fungi Known species Absorptive lifestyle Life cycle Relevance Chytrids (common in freshwater) 750 Many decompose the plants by digesting the cellulose. Mutualistic chytrids reside in the guts of deer, cows, and other mammals and help in the digestion of plant material. Parasitic chytrids infect many plant and animal species These are the only fungi that produce motile cells—both their gametes and spores through flagella. Most exhibit alteration of generations. Some are parasites of mosquitos. Batrachochytrium dendrobatidis is mainly responsible for the decline in the populations of amphibians worldwide.

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Answer 1

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29, Problem 9TYPSS

Summary Introduction

To review:

Koch’s postulates and design the study using Koch’s postulates to test the hypothesis that chytrid infections are responsible for the frog deaths.

Introduction:

Koch’s postulates state that the microorganism must be present in all the diseased individuals, but it must be absent in the healthy organism. The table mentioning that the chytrids are responsible for massive die-offs occurring in amphibians is given below:

Fungi Known species Absorptive lifestyle Life cycle Relevance

Chytrids (common in freshwater) 750
Many decompose the plants by digesting the cellulose.

Mutualistic chytrids reside in the guts of deer, cows, and other mammals and help in the digestion of plant material.

Parasitic chytrids infect many plant and animal species

These are the only fungi that produce motile cells—both their gametes and spores through flagella.

Most exhibit alteration of generations.

Some are parasites of mosquitos.

Batrachochytrium dendrobatidis is mainly responsible for the decline in the populations of amphibians worldwide.

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Anwser these Discussion Questions: Part One Why were the plants kept in the dark prior to the experiment? Why is this important? Why is it important to boil the leaf? Explain why it was necessary to use boiling alcohol? What is the purpose of the iodine? Part Two What was the purpose of keeping the leaf in the dark and then covering it with a cardboard cut-out? What conclusions can you draw from this part of the lab? Part Three 7. In this experiment what was the purpose of adding the soda lime? 8. Why was a sealed bag placed around each plant? 9. What happened in the control plants? 10. What was the result on photosynthesis? Part Four 11. Why was a variegated leaf used in this experiment? !2. What conclusions can you draw about starch production in a variegated leaf?

How did the color differences between the two bacterial species you used in this experiment help you determine if the streak plate method you performed was successful?

series of two-point crosses were carried out among six loci (a, b, c, d, e and f), producing the following recombination frequencies. According to the data below, the genes can be placed into how many different linkage groups? Loci a and b Percent Recombination 50 a and c 14 a and d 10 a and e 50 a and f 50 b and c 50 b and d 50 b and e 35 b and f 20 c and d 5 c and e 50 c and f 50 d and e 50 d and f 50 18 e and f Selected Answer: n6 Draw genetic maps for the linkage groups for the data in question #5. Please use the format given below to indicate the genetic distances. Z e.g. Linkage group 1=P____5 mu__Q____12 mu R 38 mu 5 Linkage group 2-X_____3 mu__Y_4 mu sanight

Answer 2

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29, Problem 9TYPSS

Summary Introduction

To review:

Koch’s postulates and design the study using Koch’s postulates to test the hypothesis that chytrid infections are responsible for the frog deaths.

Introduction:

Koch’s postulates state that the microorganism must be present in all the diseased individuals, but it must be absent in the healthy organism. The table mentioning that the chytrids are responsible for massive die-offs occurring in amphibians is given below:

Fungi Known species Absorptive lifestyle Life cycle Relevance

Chytrids (common in freshwater) 750
Many decompose the plants by digesting the cellulose.

Mutualistic chytrids reside in the guts of deer, cows, and other mammals and help in the digestion of plant material.

Parasitic chytrids infect many plant and animal species

These are the only fungi that produce motile cells—both their gametes and spores through flagella.

Most exhibit alteration of generations.

Some are parasites of mosquitos.

Batrachochytrium dendrobatidis is mainly responsible for the decline in the populations of amphibians worldwide.

Expert Solution & Answer

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Answer 3

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29, Problem 9TYPSS

Summary Introduction

To review:

Koch’s postulates and design the study using Koch’s postulates to test the hypothesis that chytrid infections are responsible for the frog deaths.

Introduction:

Koch’s postulates state that the microorganism must be present in all the diseased individuals, but it must be absent in the healthy organism. The table mentioning that the chytrids are responsible for massive die-offs occurring in amphibians is given below:

Fungi Known species Absorptive lifestyle Life cycle Relevance

Chytrids (common in freshwater) 750
Many decompose the plants by digesting the cellulose.

Mutualistic chytrids reside in the guts of deer, cows, and other mammals and help in the digestion of plant material.

Parasitic chytrids infect many plant and animal species

These are the only fungi that produce motile cells—both their gametes and spores through flagella.

Most exhibit alteration of generations.

Some are parasites of mosquitos.

Batrachochytrium dendrobatidis is mainly responsible for the decline in the populations of amphibians worldwide.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29, Problem 9TYPSS

Summary Introduction