Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 8, Problem 13RQ
What are homeotic genes and what is the “homeobox” contained in such genes? What is the function of the homeobox? What are Hox genes? What is the significance of their apparently universal occurrence in animals?
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Chapter 8 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 8 - What is meant by epigenesis? How did Kaspar...Ch. 8 - How is an egg (oocyte) prepared during oogenesis...Ch. 8 - Describe events that follow contact of a...Ch. 8 - What is meant by the term activation in...Ch. 8 - How does amount of yolk affect cleavage? Compare...Ch. 8 - What is the difference between radial and spiral...Ch. 8 - What other developmental hallmarks are often...Ch. 8 - What is indirect development?Ch. 8 - Using sea star embryos as an example, describe...Ch. 8 - What is the difference between schizocoelous and...
Ch. 8 - Describe two different experimental approaches...Ch. 8 - What is meant by induction in embryology? Describe...Ch. 8 - What are homeotic genes and what is the homeobox...Ch. 8 - What is the embryological evidence that...Ch. 8 - What are the four extraembryonic membranes of...Ch. 8 - What is the fate of the four extraembryonic...Ch. 8 - Explain what the growth cone that Ross Harrison...Ch. 8 - Name two organ-system derivatives of each of the...Ch. 8 - Prob. 19RQCh. 8 - SCNT makes possible therapeutic cloning. What are...
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- How do the Hox genes of vertebrates differ from those of cephalochordates?arrow_forwardThe cnidaria, jelly fish, are the first organisms to exhibit? a) an ectoderm layer b) endoderm layer with digestive cells that release enzymes in to a digestive structure c) ectoderm cells that specialize to become cells which react to a stimulus and produce movement d) a water-based internal environment (prebiotic ocean) between the ectoderm and the endoderm e) all are true for cnidariaarrow_forwardHow is that physiological mechanism being regulated of hibernating bats (Chiroptera)?arrow_forward
- The evolution / development of the skeletal system of the vertebrate is an example of the process of cellular specialization. This refers to the fact? a) all the ectoderm cells remain the same b) the cells derived from the endoderm to form osteocytes that secrete collagen c) the cells of the endoderm form chondrocytes that become notochord d) genes are activated or surpressed in the cells from the original mesoderm causing them to become chondrocytes and osteocytes the stem cells that sequentially produce the componets of the skeleton e) genes are not involved in this function?arrow_forwardWhat are 5 examples of physiological adaptation in mammals (Note:Pls. specify the name of the mammal and its adaptation)? How does this adaptation lead to survival and reproductive success?arrow_forwardThe developmental pattern of C. elegans is said to be mosaic because (a) development is controlled by gradients of morphogens (b) part of the embryo fails to develop if a founder cell is destroyed (c) some individuals are selffertilizing hermaphrodites (d) all development is controlled by maternal effect genes (e) apoptosis never occursarrow_forward
- Which stage of chimpanzee development is most similar to adult Ardipithecus ramidus? To adult Australopithecus afarensis? To adult Homo sapiens? What do these observations suggest with regards to developmental timing?arrow_forwardO potassium ions O sodium ions Question 18 In sea urchins, which of the following pairs of events most directly results in the short-lasting "fast block" and the longer-lasting "slow block" to polyspermy, respectively? O formation of the jelly coat and the vitellin membranes O the cortical reaction and the formation of yolk protein O the acrosomal reaction and vitellogenesis O membrane depolarization and the cortical reaction Question 19 Which of the following correctly describes a difference between the vegetal pole of a frog zygote and the animal pole? O The blastomeres originate only in the vegetal pole. O The vegetal pole has a higher concentration of yolk. O The polar bodies bud from this region. The vegetal pole cells undergo mitosis, but not cytokinesis. 1arrow_forwardWhich 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.arrow_forward
- Describe and distinguish patterns of reproduction in monotremes, marsupials, and placental mammals. What aspects of mammalian reproduction characterize all mammals but no other vertebrates?arrow_forwardWhat are the differences between unfertilized and fertilized egg? Differentiate miolecithal, medialecithal and megalecithal. What organisms exhibit these features? What is the difference between isolecithal and telolecithal? How may these features affect the development of the organisms? What structures are derived from the ectoderm, mesoderm, and the endoderm?arrow_forwardWhat is the fate of the four extraembryonic membranes in embryos of placental mammals?arrow_forward
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