Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 18, Problem 7RQ
Which of the following gives rise to the skin cells?
a. ectoderm
b. endoderm
c. mesoderm
d. none of the above
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Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.
Chapter 18 Solutions
Concepts of Biology
Ch. 18 - Figure 18.12 Which of the following statements...Ch. 18 - Figure 18.17 Which of the following statements...Ch. 18 - In which group is parthenogenesis a normal event?...Ch. 18 - Genetically unique individuals are produced...Ch. 18 - External fertilization occurs in which type of...Ch. 18 - The process of gastrulation forms the _______. a....Ch. 18 - Which of the following gives rise to the skin...Ch. 18 - Sperm are produced in the _______. a. scrotum b....Ch. 18 - Which female organ has an endometrial lining that...Ch. 18 - Which hormone causes FSH and LH to be released? a....
Ch. 18 - Nutrient and waste requirements for the developing...Ch. 18 - Which hormone is primarily responsible for the...Ch. 18 - What might be a disadvantage to...Ch. 18 - Compared to separate sexes and assuming...Ch. 18 - What do you think would happen if multiple sperm...Ch. 18 - Compare spermatogenesis and oogenesis as to timing...Ch. 18 - Describe the events in the ovarian cycle leading...Ch. 18 - Describe the stages of labor.
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- Which 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 primary germ layer gave rise to the cells that eventually became the central nervous system? a. endoderm b. ectoderm c. acrosome d. mesodermarrow_forwardWhich tissue type or organ is correctly matched with its germ layer tissue? A) nervous–mesoderm B) muscular–ectoderm C) stomach–mesoderm D) skin–ectodermarrow_forward
- which germ layer (tissue) gives rice to our nervous system and outer coverings. a) endotherm b) ectoderm c) mesoderm d) endodermarrow_forwardEndoderm, Mesoderm, and Ectoderm are formed during ________. a. Gametogenesis b. Cleavage c. Gastrulation d. Organogenesisarrow_forwardThe process forming the neural tube and plate via the intercalation of cells along the medial-lateral axis and extension along the anterior-posterior axis occurs is called? a. neurulation b. embryogenesis c. convergent extension d. morphogenesisarrow_forward
- Which of the following cell layers is not necessary to be considered a eumetazoan? a. Ectoderm b. Endoderm c. Mesoderm d. All of the above are found in all eumetazoans.arrow_forwardFrom which of the following is the embryo developed? a) Trophoblasts b) Blastocoelen c) The yellow sacks d) Inner cell massarrow_forwardAlong the notochord, segmented blocks of tissue that give rise to muscles, vertebrae, and connective tissues are calleda. neural crests.b. morulas.c. primitive streaks.d. somitesarrow_forward
- Which of the following is a function of the reproductive system? (A) to produce all of the body's hormones (B) to regulate body temperature (C) to make hormones that fight disease (D) to regulate the development of male and female characteristicsarrow_forwardThe Embryonic stem cells can be derived from _______ which is developed by “invitro fertilization”.a) late embryo b) early embryo c) embryo d) zygotearrow_forwardThe beginning of brain and spinal cord formation is termeda. cephalocaudal folding.b. organogenesis.c. neurulation.d. gastrulation.arrow_forward
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