The properties that the earliest proto-cells hypothesized to have in common with modern-day cellular organisms and mention the properties of modern-day cellular organisms that are hypothesized to have been absent in the earliest proto-cells. Introduction: The evolution of cell membrane plays a very important role in the adaptation of modern cellular organisms in the varying environment. It keeps useful cellular secretions intact, maintains chemically distinct intracellular components, and provides protection from parasitic attack.

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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 25.2, Problem 3SB

Summary Introduction

To review:

The properties that the earliest proto-cells hypothesized to have in common with modern-day cellular organisms and mention the properties of modern-day cellular organisms that are hypothesized to have been absent in the earliest proto-cells.

Introduction:

The evolution of cell membrane plays a very important role in the adaptation of modern cellular organisms in the varying environment. It keeps useful cellular secretions intact, maintains chemically distinct intracellular components, and provides protection from parasitic attack.

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Choanoflagellates have collagen and the same genes coding for cell communication and adhesion that present in multicellular animals with bodies. Which best explains what this reveals regarding the evolution of multicellular bodies in animals? A) All of the genetic machinery and all of the body building materials (or similar precursors) evolved only after the appearance of multicellular bodies. B) The genetic machinery and some of the same body building materials (or similar precursors) are present in single-celled organisms, thus natural selection could use these for the evolution of multicellular bodies. C) That multicellular bodies evolved only once in evolutionary history, and it was within animals because collagen was present, along with the genetic machinery necessary for cell adhesion and communication. D) None of the above.

Why are embryological features important for distinguishing the major groups of phyla?

Do plants and animals have a common multicellular ancestor?

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 25.2, Problem 3SB

Summary Introduction

To review:

The properties that the earliest proto-cells hypothesized to have in common with modern-day cellular organisms and mention the properties of modern-day cellular organisms that are hypothesized to have been absent in the earliest proto-cells.

Introduction:

The evolution of cell membrane plays a very important role in the adaptation of modern cellular organisms in the varying environment. It keeps useful cellular secretions intact, maintains chemically distinct intracellular components, and provides protection from parasitic attack.

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 25.2, Problem 3SB

Summary Introduction

To review:

The properties that the earliest proto-cells hypothesized to have in common with modern-day cellular organisms and mention the properties of modern-day cellular organisms that are hypothesized to have been absent in the earliest proto-cells.

Introduction:

The evolution of cell membrane plays a very important role in the adaptation of modern cellular organisms in the varying environment. It keeps useful cellular secretions intact, maintains chemically distinct intracellular components, and provides protection from parasitic attack.

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 25.2, Problem 3SB

Summary Introduction