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 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.
Early in the development of skin, ectoderm becomes
A. periderm and mesoderm becomes mesenchyme
B. mesenchyme and endoderm becomes periderm
C. the vernix caseosa and mesoderm becomes the stratum basale
C. perichondrium and mesoderm becomes the vernix caseosa
Layer A is called _____X________, and ______Y________ develops from this layer.
Select one:
a.
X
Y
Ectoderm
Nervous system
b.
X
Y
Endoderm
Nervous system
c.
X
Y
Endoderm
Lining of the digestive tract
d.
X
Y
Ectoderm
Lining of the digestive tract
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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