Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 43, Problem 27RQ
Which of the following is false?
- The endoderm, mesoderm, ectoderm are germ layers
- The trophoblast is a germ layer
- The inner cell mass is a source of embryonic stem cells
- The blastula is often a hollow ball of cells.
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Chapter 43 Solutions
Biology 2e
Ch. 43 - Figure 43.8 Which of the following statements...Ch. 43 - Figure 43.15 Which of the following statements...Ch. 43 - Figure 43.17 Which of the following statements...Ch. 43 - Which form of reproduction is thought to be best...Ch. 43 - Which form of reproduction can result from damage...Ch. 43 - Which form of reproduction is useful to an animal...Ch. 43 - Genetically unique individuals are produced...Ch. 43 - External fertilization occurs in which type of...Ch. 43 - Which term applies to egg development within the...Ch. 43 - Which term applies to egg development outside the...
Ch. 43 - Sperm are produced in the______ scrotum seminal...Ch. 43 - Most of the bulk of semen is made by the...Ch. 43 - Which of the following cells in spermatogenesis is...Ch. 43 - Which female organ has the same embryonic origin...Ch. 43 - Which female organ has an endometrial lining that...Ch. 43 - How many eggs are produced as a result of one...Ch. 43 - Which hormone causes Leydig cells to make...Ch. 43 - Which hormone causes FSH and LH to be released?...Ch. 43 - Which hormone signals ovulation? FSH LH inhibin...Ch. 43 - Which hormone causes the regrowth of the...Ch. 43 - Nutrient and waste requirements for the developing...Ch. 43 - Progesterone is made during the third trimester by...Ch. 43 - Which contraceptive method is 100 percent...Ch. 43 - Which type of short term contraceptive method is...Ch. 43 - Which hormone is primarily responsible for The...Ch. 43 - Major organs begin to develop during which part of...Ch. 43 - Which of the following is false? The endoderm,...Ch. 43 - During cleavage, the mass of cells: increases...Ch. 43 - Which of the following gives rise to the skin...Ch. 43 - The ribs form from the ___________ . notochord...Ch. 43 - Why is sexual reproduction useful if only half the...Ch. 43 - What determines which sex will result in offspring...Ch. 43 - What are the advantages and disadvantages of...Ch. 43 - Why would paired external fertilization be...Ch. 43 - Describe the phases of the human sexual response.Ch. 43 - Compare spermatogenesis and oogenesis as to timing...Ch. 43 - If male reproductive pathways are not cyclical,...Ch. 43 - Describe the events in the ovarian cycle leading...Ch. 43 - Describe the major developments during each...Ch. 43 - Describe the stages of labor.Ch. 43 - What do you think would happen if multiple sperm...Ch. 43 - Why do mammalian eggs have a small concentration...Ch. 43 - Explain how the different germ layers give rise to...Ch. 43 - Explain the role of axis formation in development.
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- Figure 29.22 Which of the following statements about the parts of an amniotic egg are false? The allantois stores nitrogenous waste and facilitates respiration. The chorion facilitates gas exchange. The yolk provides food for the growing embryo. The amniotic cavity is filled with albumen.arrow_forwardWhich of the following are mismatched? (a) endoderm; lining of the digestive tube (b) ectoderm; circulatory system (c) mesoderm; notochord (d) mesoderm; reproductive system (e) ectoderm; sense organsarrow_forwardWhich of the following consists of both fetal and maternal tissues? (a) umbilical cord (b) placenta (c) amnion (d) allantois (e) yolk sacarrow_forward
- Put these human developmental events in order, from earliest to latest a. blastocyst forms d. implantation b. heart begins beating e. breathing practice begins c. gastrulation f. neural tube formsarrow_forwardWhich of the following statements about the number of chromosomes in egg cells and zygotes is true? Egg cells and zygotes have 46. Egg cells and zygotes have 23. Egg cells have 23, and zygotes have 46. Egg cells have 46, and zygotes have 23. Please I need a surely answer and a quicker responsearrow_forwardFrom which of the following is the embryo developed? Trophoblasts Inner cell mass Blastocoelen The yellow sacksarrow_forward
- Which of the following mammalian structures is derived from one of the extra embryonic membranes? Placenta Uterus Ovary Cervix The spaces in the ends of a long bone such as the femur contain? Yellow bone marrow Plasma Osteocytes Red bone marrowarrow_forwardIn frog neurulation the notochord _______ the formation of the _______ in the ectoderm next to it. Group of answer choices expresses, neural plate induces, neural plate induces, somites expresses, somitesarrow_forwardWhich of the following statements is false? a. Cadherins, but not integrins play a role in gastrulation. b. Gastrulation creates the primary germ layers c. Gastrulation requires cells to change their gene expression. d. Body axes are stabilized (made permanent) during gastrulation.arrow_forward
- Which of the following rows correctly identifies the development of the germ layers? Select one: A. Endoderm Mesoderm Ectoderm Placenta Muscle Hair and nails B. Endoderm Mesoderm Ectoderm Stomach and intestine Lining Reproductive system Brain and Spinal Cord C. Endoderm Mesoderm Ectoderm Muscle Bones Epidermis D. Endoderm Mesoderm Ectoderm Lungs and stomach linings Heart and Lungs Liver and pancreasarrow_forwardWhich of the following cells develops into a human embryo?A. TrophoblastB. Extraembryonic membraneC. Inner cell massD. CumulusE. All of the abovearrow_forwardWhich of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous systemarrow_forward
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