All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

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Answer 1

Question

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

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Linkage in common bean Alleles at the P locus control seed color. Plants which are pp have white seeds, white flowers and no pigment in vegetative parts. Plants which are P_ have black seeds, purple flowers and may have varying degrees of pigment on stems and leaves. Seed color can be assessed, visually, based on if the seed is white or not white A gene for mold resistance has been reported and we want to determine its inheritance and whether it is linked to P. For the purposes of this exercise, we will assume that resistance is controlled by a single locus M, and M_ plants are resistant and mm plants are susceptible. Resistance can be measured, under greenhouse conditions, 2 weeks after planting, by injecting each seedling with a spore suspension. After two weeks, the seedlings can be rated as resistant or susceptible, based on whether or not tissue is actively sporulating. For this exercise we will use seed and data from the F10 generation of a recombinant inbred population…

Alleles at the P locus control seed color. Plants which are pp have white seeds, white flowers and no pigment in vegetative parts. Plants which are P_ have black seeds, purple flowers and may have varying degrees of pigment on stems and leaves. Seed color can be assessed, visually, based on if the seed is white or not white A gene for mold resistance has been reported and we want to determine its inheritance and whether it is linked to P. For the purposes of this exercise, we will assume that resistance is controlled by a single locus M, and M_ plants are resistant and mm plants are susceptible. Resistance can be measured, under greenhouse conditions, 2 weeks after planting, by injecting each seedling with a spore suspension. After two weeks, the seedlings can be rated as resistant or susceptible, based on whether or not tissue is actively sporulating. For this exercise we will use seed and data from the F10 generation of a recombinant inbred population produced using single seed…

can you help? I think its B but not sure

Answer 2

Question

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

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Answer 3

Question

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

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Answer 4

Question

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

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

Answer 5

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

Answer 6

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.

Conclusion

Cnidarians are characterized by the presence of collar cells.

Answer 7

Chapter 31, Problem 1TYU

Summary Introduction

Introduction: All sponges belong to a phylum called Porifera. They are the simplest animals with cellular level of organization. They have diverged from other animals early in the evolution. They have a very simple body structure composed of only two layers of cells. In between the two layers, a gelatinous region is present called mesohyl. The exchange of nutrient and waste material takes place through diffusion in sponges.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYU

Correct answer: Collar cells (chaonocytes) are characteristics of poriferans. Hence, the correct answer is option (a).

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Reason for the correct answer:

Option (a) is given as “poriferans”. The interior space of the body of poriferans is characterized by numerous canals lined with flagellate choanocytes. These cells help to capture food particles. They generate water flow through the body of the sponges. Hence, the correct answer is option (a).

Reasons for the incorrect answers:

Option (b) is given as “cnidarians”. Cnidarians are characterized by cnidocytes. Hence, option (b) is incorrect.

Option (c) is given as “most celomates”. Collar cells are characteristics of acelomate that is in poriferans. Hence, option (c) is incorrect.

Option (d) is given as, “lophotrochozoans”. Collar cells (chaonocytes) are not the characteristics of lophotrochozoans. Hence, option (d) is incorrect.

Option (e) is given as “ecdysozoans”. Ecdysozoans lack collar cells. Hence, option (e) is incorrect.

Hence, options (b), (c), (d), and (e) are incorrect.