_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the a. amnion. b. yolk sac. c. cembryoblast. d. trophoblast.

Question

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Answer 1

Textbook Question

Chapter 29, Problem 1DYB

_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the

a. amnion.
b. yolk sac.
c. cembryoblast.
d. trophoblast.

Expert Solution & Answer

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.) Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…

What are Clathrin coated vesicles and what is their function?

Answer 2

Textbook Question

Chapter 29, Problem 1DYB

_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the

a. amnion.
b. yolk sac.
c. cembryoblast.
d. trophoblast.

Expert Solution & Answer

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

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Answer 3

Textbook Question

Chapter 29, Problem 1DYB

_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the

a. amnion.
b. yolk sac.
c. cembryoblast.
d. trophoblast.

Expert Solution & Answer

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

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

Answer 4

Textbook Question

Chapter 29, Problem 1DYB

_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the

a. amnion.
b. yolk sac.
c. cembryoblast.
d. trophoblast.

Expert Solution & Answer

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

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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:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

Fertilization is defined as the process by which male and female gametes are the fuse to form a zygote and it is further developed into an embryo. The zygote form contains a diploid number of chromosomes.

Answer 12

Answer to Problem 1DYB

Correct answer:

Trophoblast is the outer layer of the blastocyst which is attached to the wall of the uterus at implantation. Therefore, option d. is correct.

Answer 13

Explanation of Solution

Reason for the correct statement:

Option d. is given as “trophoblast”. Trophoblast is an outer layer of cells that surrounds the fluid-filled cavity. These cells will form chorion. It plays an important role in implantation of the embryo and also in the formation of the placenta.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “amnion”. It is an extraembryonic membrane formed from epiblast layer. It is a thin membrane. Hence, option a. is incorrect

Option b. is given as “yolk sac”. It is the first extraembryonic membrane and is formed from hypoblast layer. Hence, option b. is incorrect.

Option c. is given as “embryoblast”. It is the inner mass of the blastocyst. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Answer 14

Conclusion

Trophoblast is the outer layer of the blastocyst which is involved in embryo implantation.

Answer 15

Ch. 29.1 - Prob. 1LO Ch. 29.1 - What distinguishes the pre-embryonic period from...Ch. 29.2 - Prob. 2LO Ch. 29.2 - Prob. 3LO Ch. 29.2 - Prob. 1WDT Ch. 29.2 - Prob. 2WDL Ch. 29.2 - Prob. 3WDL Ch. 29.2 - Prob. 4LO Ch. 29.2 - Prob. 5LO Ch. 29.2 - How many cells are present initially in the...

_____ 1. The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the a. amnion. b. yolk sac. c. cembryoblast. d. trophoblast.

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Answer to Problem 1DYB

Explanation of Solution

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Chapter 29 Solutions