To contrast: The nutritional mode of fungus and humans. Concept introduction: Nutrients are the substances in food that maintain the body and make it work. Fungi are multicellular eukaryotes (except yeast) and are classified according to their structure and mode of reproduction. Fungi are achlorophylous (do not contain chlorophyll and not able to make food). They are heterotrophic feeders as they depend on other organisms for the carbon source. Unlike humans, they do not ingest their food but instead absorb nutrients from the surrounding environment by secreting various hydrolytic enzymes or act in the form of saprobes, symbionts, or parasites . By contrast, humans have the holozoic mode of nutrition; they relatively ingest large pieces of food and thus, digest the food in their bodies.

Question

Describe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?

Answer 1

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 31.1, Problem 1CC

Summary Introduction

To contrast: The nutritional mode of fungus and humans.

Concept introduction: Nutrients are the substances in food that maintain the body and make it work. Fungi are multicellular eukaryotes (except yeast) and are classified according to their structure and mode of reproduction. Fungi are achlorophylous (do not contain chlorophyll and not able to make food). They are heterotrophic feeders as they depend on other organisms for the carbon source. Unlike humans, they do not ingest their food but instead absorb nutrients from the surrounding environment by secreting various hydrolytic enzymes or act in the form of saprobes, symbionts, or parasites. By contrast, humans have the holozoic mode of nutrition; they relatively ingest large pieces of food and thus, digest the food in their bodies.

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Describe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?

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The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?

Answer 2

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 31.1, Problem 1CC

Summary Introduction

To contrast: The nutritional mode of fungus and humans.

Concept introduction: Nutrients are the substances in food that maintain the body and make it work. Fungi are multicellular eukaryotes (except yeast) and are classified according to their structure and mode of reproduction. Fungi are achlorophylous (do not contain chlorophyll and not able to make food). They are heterotrophic feeders as they depend on other organisms for the carbon source. Unlike humans, they do not ingest their food but instead absorb nutrients from the surrounding environment by secreting various hydrolytic enzymes or act in the form of saprobes, symbionts, or parasites. By contrast, humans have the holozoic mode of nutrition; they relatively ingest large pieces of food and thus, digest the food in their bodies.

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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 31.1, Problem 1CC

Summary Introduction

To contrast: The nutritional mode of fungus and humans.

Concept introduction: Nutrients are the substances in food that maintain the body and make it work. Fungi are multicellular eukaryotes (except yeast) and are classified according to their structure and mode of reproduction. Fungi are achlorophylous (do not contain chlorophyll and not able to make food). They are heterotrophic feeders as they depend on other organisms for the carbon source. Unlike humans, they do not ingest their food but instead absorb nutrients from the surrounding environment by secreting various hydrolytic enzymes or act in the form of saprobes, symbionts, or parasites. By contrast, humans have the holozoic mode of nutrition; they relatively ingest large pieces of food and thus, digest the food in their bodies.

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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 31.1, Problem 1CC

Summary Introduction