Cells migrate, transforming a blastula into a gastrula. Answer Bank The presence of a cell wall restricts the movement of cells. Cell division and tissue differentiation occur at localized regions called meristems. Cell division and tissue differentiation occur throughout the developing body.

Which of the following structures is not an extra-embryonic membrane of amniotes?   Question 17 options:   The allantois   The pharyngeal cleft   The chorion   The yolk   The amnion

In the development of a "three-parent baby", the third parent donates which of the following? nuclear DNA sperm egg mitochondria only egg with the nucleus removed

Recombination and independent assortment are two events that occur in the life cycle of an animal that result in genetic variation. Use the check mark to select the stage of the animal life cycle during which both events occur.

Which of the following structures of a mammalian embryo can be used to produce embryonic stem cells by simple maintenance in culture? (Check all that apply.) A Epiblast Primitive endoderm Trophectoderm Blastocoel Inner cell mass

10 @ 2 # 3 Question 6 During the start of the third week of development, numerous lacunae appear in the primary extraembryonic mesodermal reticulum to form the future chorionic cavity. Between which two layers does this mesodermal layer initially appear? Select one: O a. Syncytiotrophoblast and cytotrophoblast @ O O b. Exocolomic (Heuser's) membrane and cytotrophoblast. c. Syncytiotrophoblast and extracoelomic (Heuser's) membrane d. Epiblast and hypoblast O e. Syncytiotrophoblast and endometrium Previous page Not yet answered $ 4 24 Marked out of 1,00 % 5 4 A 6 P Flag question MacBook Pro <44) & 7 * x 8 ( 9 c -0 D - { + 11 } Next page delete

What four types of cellular processes must occur to enable a fertilized egg to develop into an adult multicellular animal? Briefly discuss the role of each process. C2. The arrangement of body axes of the discuss the role of each process.

What is the importance of blastopore formation in protostomes? There may be multiple correct answers. Select one or more: O it is involved in the process of gastrulation to form the third layer of tissues in triploblastic organisms: the mesoderm O it is involved in the process of gastrulation, and will be used to release gases from the internal body of an organism O that the gastrovascular cavity of protostomes is formed by the indentation of the blastula early in development, starting with the mouth O that the gastrovascular cavity of protostomes is formed by the indentation of the blastula early in development, starting with the anus O the blastopore isn't really that important

Match the tissue to the germ layer it develops from. Question   Epithelium   Central nervous system   Muscles   Digestive tract   Skeleton   All Answer Choices A. Endoderm B. Mesoderm C. Ectoderm

https://nj.pbslearningmedia.org/resource/tdc02.sci.life.stru.different/cell-differentiation/#.XhYcbf5KjBI How would you explain the similarities among bird, mammal, and reptile embryos at the early stages of development, and what directs the sequence of events during embryonic development?