A(n) ______ develops from a two-layer embryo. a. sea star c. butterfly b. sea anemone d. earthworm

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 23, Problem 1SA

A(n) ______ develops from a two-layer embryo.

a. sea star	c. butterfly
b. sea anemone	d. earthworm

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

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

Ch.23 How is Salmonella able to cross from the intestines into the blood? A. it is so small that it can squeeze between intestinal cells B. it secretes a toxin that induces its uptake into intestinal epithelial cells C. it secretes enzymes that create perforations in the intestine D. it can get into the blood only if the bacteria are deposited directly there, that is, through a puncture — Which virus is associated with liver cancer? A. hepatitis A B. hepatitis B C. hepatitis C D. both hepatitis B and C — explain your answer thoroughly

Ch.21 What causes patients infected with the yellow fever virus to turn yellow (jaundice)? A. low blood pressure and anemia B. excess leukocytes C. alteration of skin pigments D. liver damage in final stage of disease — What is the advantage for malarial parasites to grow and replicate in red blood cells? A. able to spread quickly B. able to avoid immune detection C. low oxygen environment for growth D. cooler area of the body for growth — Which microbe does not live part of its lifecycle outside humans? A. Toxoplasma gondii B. Cytomegalovirus C. Francisella tularensis D. Plasmodium falciparum — explain your answer thoroughly

Ch.22 Streptococcus pneumoniae has a capsule to protect it from killing by alveolar macrophages, which kill bacteria by… A. cytokines B. antibodies C. complement D. phagocytosis — What fact about the influenza virus allows the dramatic antigenic shift that generates novel strains? A. very large size B. enveloped C. segmented genome D. over 100 genes — explain your answer thoroughly

Answer 2

Textbook Question

Chapter 23, Problem 1SA

A(n) ______ develops from a two-layer embryo.

a. sea star	c. butterfly
b. sea anemone	d. earthworm

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

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

Textbook Question

Chapter 23, Problem 1SA

A(n) ______ develops from a two-layer embryo.

a. sea star	c. butterfly
b. sea anemone	d. earthworm

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

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

Textbook Question

Chapter 23, Problem 1SA

A(n) ______ develops from a two-layer embryo.

a. sea star	c. butterfly
b. sea anemone	d. earthworm

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

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

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.

Conclusion

The organism that arises from a two-layer embryo is a sea anemone. Thus, the correct option is b.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. All kinds of animals reproduce to give rise to their offspring. Animals do not contain a cell wall, and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food.

Answer 12

Answer to Problem 1SA

Correct answer:

A sea anemone develops from a two-layer embryo. Hence, the correct answer is option b.

Answer 13

Explanation of Solution

Reason for correct answer:

Option b. is given as “sea anemone.”

The collection of similar type of cells forms tissue. Animals contain tissue and similar kinds of tissue join together to form the organs. Cnidarians are the simpler animals that live in water bodies. The embryo of cnidarians contains two-layer, an outer layer called ectoderm, and the inner layer that is known as endoderm. Sea anemones are the cnidarians that develop from a two-layer embryo.

Reason for incorrect answer:

Option a. is given as, “sea star.”

Seastar is also known as starfish, and it belongs to the phylum “Echinoderm.” Sea star arises from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm), and inner layer (endoderm). This indicates that sea star does not form from a two-layer embryo. Hence, option a. is incorrect.

Option c. is given as, “butterfly.”

Butterfly is not a cnidarian. It is a complex insect that forms from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that the butterfly does not arise from a two-layer embryo. Hence, option c. is incorrect.

Option d. is given as, “earthworm.”

Earthworm belongs to the phylum named “Annelid.” It is formed from a three-layered embryo. These three layers are outer layer (ectoderm), middle layer (mesoderm) and inner layer (endoderm). This indicates that earthworm does not arise from a two-layer embryo. Hence, option d. is incorrect.

Hence, the options a., c., and d. are incorrect.