Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 17, Problem 2CT
Summary Introduction
To determine: What did Lewis Wolpert mean when he said that the most important moment in life is gastrulation.
Introduction: Gestation or pregnancy is the period during which the offspring develops within the uterus of a sexually mature woman. This involves several developmental stages of the fetus. In humans, pregnancy is nearly nine months long, which is divided into three trimesters, involving several changes in the mother and the growing fetus.
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This question is about mammals.
a) What is the one defining characteristic that determines a mammal?
b) Compare and contrast the three types of mammals with respect to fetal development and birth: the monotremes (such as the platypus), the marsupials (such as kangaroos), and the placentals (such as humans or dogs). That is, where does most of the early development occur, how is the young mammal introduced to the world, and how does the young obtain nourishment once introduced to the world?
Which of the following is an INCORRECT statement?
Question 6 options:
a)
The early embryo of a higher animal is never like a lower animal, but only like its early embryo.
b)
During the first three stages of development, blastomeres become smaller by way of each embryonic cleavage.
c)
The space inside of the neural tube will eventually become the space inside of the digestive system.
d)
A zygote results from the union of sperm and egg.
State and explain 5 effects of tobacco smoking by a pregnant mother on the foetus development. (400 words)
Identify and explain 5 disadvantages of In vitro fertilisation (IVF) as an intervention to have a baby. (400 words)
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Chapter 17 Solutions
Human Biology (MindTap Course List)
Ch. 17 - Define and describe the main features of the...Ch. 17 - Prob. 2RQCh. 17 - Summarize the development of an embryo and a...Ch. 17 - Label the early development stages shown in the...Ch. 17 - Prob. 1SQCh. 17 - During cleavage, the _______ is converted to a...Ch. 17 - Prob. 3SQCh. 17 - Prob. 4SQCh. 17 - _________ is the gene-guided process by which...Ch. 17 - In a human zygote, the cell divisions of cleavage...
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- Birds, reptiles and insects have something in common as far as the development of their embryos. What do they have in common?arrow_forwardA human is a complex organism that develops from a zygote. Briefly explain some of the the steps in this development process in the form of a paragraph. In your answer, be sure to: 1) explain how a zygote formed, 2) compare the genetic content of the zygote to the body cells of the parents, 3) identify the structure in which embryonic/fetal development usually occurs within, and 4) identify the structure that forms, which provides nourishment and waste removal to/from the developing baby.arrow_forwardWhat is meant by the term “activation” in embryology?arrow_forward
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