Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 42, Problem 12SQ
Summary Introduction
Concept introduction: Apoptosis is where cells are programmed to die. Apoptosis occurs during two conditions: when the cells age and during development.
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A gastrulation does NOT
Select one:
A. Consist of endoderm, mesoderm, and ectoderm
B. Result in the formation of a third layer in the embryonic disc
C. Involve the formnation of germ layers
D. Include the differentiation of cells into tissues and organs
During embryonic development, unique cell layers develop into specific groups of tissues or organs during a stage called ________. a. the blastula stage b. the germ layer stage c. the gastrula stage d. the organogenesis stage
During the embryonic developmen, the trophoblast will developed into
Select one:
A. The embryonic disc
B. The chorion
C. The amnion and amniotic cavity
D. The yolk sac
Chapter 42 Solutions
Biology: The Unity and Diversity of Life
Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Prob. 4DAACh. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Prob. 4SQCh. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...
Ch. 42 - The placenta consists of __________. a. embryonic...Ch. 42 - During the fetal period, ____________. a....Ch. 42 - Prob. 9SQCh. 42 - Match each hormone with its action(s). ______...Ch. 42 - Prob. 11SQCh. 42 - Prob. 12SQCh. 42 - Prob. 13SQCh. 42 - Prob. 14SQCh. 42 - Place these events in human development in the...Ch. 42 - The rubella virus causes German measles. If a...Ch. 42 - A nursing mother who has an alcoholic drink...Ch. 42 - To determine the effect of the bicoid gene,...Ch. 42 - If an embryo splits at the two-cell stage, each of...
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- In human beings, after fertilisation, the structure which gets embedded in the wall of uterus is: (a) ovum (b) embryo (c) foetus (d) zygotearrow_forwardThe beginning of brain and spinal cord formation is termeda. cephalocaudal folding.b. organogenesis.c. neurulation.d. gastrulation.arrow_forwardEndoderm, Mesoderm, and Ectoderm are formed during ________. a. Gametogenesis b. Cleavage c. Gastrulation d. Organogenesisarrow_forward
- From which of the following is the embryo developed? a) Trophoblasts b) Blastocoelen c) The yellow sacks d) Inner cell massarrow_forwardThe placenta function to Select one: A. Produce blood cells B. Provide nutrition for the growing fetus C. Exchange nutrients and wastes D. Creat amniotic fluidarrow_forwardPlacenta ... a) ... develops from trophoblast cells. b) ... develops from embryoblast cells. c) ... allows the blood of the mother and fetus to be mixedarrow_forward
- How does folate deficiency affect fetal development? A. It does not affect fetal development B. It increases the health of the fetus C. It can cause birth defects D. It helps the fetus to develop fasterarrow_forwardThe folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer choices a. somites b. the archenteron c. the neural tube d. the gastrula e. the blastulaarrow_forwardThe archenteron develops into(A) the mesoderm.(B) the endoderm.(C) the placenta.(D) the lumen of the digestive tract.arrow_forward
- The process of gastrulation forms the _______. a. blastula b. zygote c. organs d. germ layersarrow_forwardAt what stage uteroplacental circulation started? a.Maternal blood entering the lacunar b.Embryo completely embedded c.Formation of extraembryonic mesoderm d.Formation of lacunararrow_forwardIn humans, the development of fertilised egg takes place in the: (a) ovary (b) testis (c) oviduct (d) uterusarrow_forward
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