Gastrulation - Study guides, Revision notes & Summaries

BIO 467 EXAMS 2 - GASTRULATION XENOPUS QUESTIONS AND ANSWERS

INTRODUCTION TO DEVELOPMENTAL BIOLOGY 2 GASTRULATION 3 MAJOR EARLY EVENTS 1 5 MAJOR EARLY EVENTS 2 7 DEVELOPMENT AND EVOLUTION 9 CELL DIVISION AND DIFFERENTIATION 11

Textbook Readings Chapter _ 32 Animal Diversity Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers Animals are a diverse monophyletic group with 34 major animal phyla About 1.3 million species of animals living Three characteristics define the entire group 1. Mode of nutrition 2. Cell structure and specialization 3. Reproduction and development Nutritional Monde Animals are heterotrophs They cannot construct all their own or...

Bio 172 Animals Exam Questions With Verified Solutions **Which characteristic(s) is (are) unique to animals?** A) Structural carbohydrate, chitin B) Nervous and muscular tissue C) Heterotrophy D) Gametes ** Answer: B) Nervous and muscular tissue** **What feature do all deuterostomes share?** A) Adults exhibit bilateral symmetry B) Embryos develop pharyngeal pouches that may or may not form gill slits C) All possess a spinal column D) The blastopore formed during gastrulatio...

General Embryonic Development is Described as Either Trimesters (3x 3-Month Periods):  First: - Foundations of Major Organs  Second: - Development of Organs  Third: - Rapid Growth & Fully Functional Organs. OR... Anatomical Stages: **(These are more relevant) Pre-Embryonic Period: 0-2 Weeks  Fertilisation  Blastocyst Formation & Implantation  Gastrulation Embryonic Period: 3-8 Weeks  Development & Differentiation of 3 Germ Layers into foundations of Organs. Foe...

bicoid Correct Answer-these genes encode cytoplasmic determinants in the anterior tip of the embryo syncytial blastoderm Correct Answer-the stage of embryonic development during which bicoid expression is significantly reduced syncytial blastoderm Correct Answer-stage of embryonic development in which nuclei move to the periphery of the cell, forming a single layer, with each nuclei barely separated from its neighbors cellular blastoderm Correct Answer-stage of embryonic development aft...

TAMU BIOLOGY 112 EXAM 3 QUESTIONS AND ANSWERS ALREADY PASSED Select the TRUE statement about animal development: A.) Deuterostome development is indeterminate. B.) Mesoderm in protostomes arises as outpocketings of the primitive gut. C.) Radial cleavage is characteristic of protostome development. D) In deuterostomes, the blastopore ultimately becomes the mouth of the adult. E) All of the above are true. Deuterostome development is indeterminate. During embryogenesis o...

BIO 172 Pre-Questions Latest Version Graded A+ **What is a spermatheca?** A. Stores male gametes in the male reproductive system B. Sorts viable male gametes from non-viable male gametes C. Delivers male gametes to females D. Stores male gametes in the female reproductive system E. Creates male gametes **Correct Answer:** D. Stores male gametes in the female reproductive system **Where does internal fertilization occur in organisms?** A. Viviparity B. Ovoviparity C. Oviparity ...

The Process of gut rotation Questions And Answers 1. What is gastrulation? - CORRECT ANSWER-The stage following the blastula whereby the embryo develops three layers: ecto-, meso-, and endoderm. 2. What is the etymology of the word "gastrula"? - CORRECT ANSWER-It is a modern Latin word comprised of the Greek Gaster (stomach) plus the Latin diminutive ending -ula. 3. When does gastrulation take place in humans? - CORRECT ANSWER-At the 3rd week of development. 4. What is the innervatio...

Where does fertilization occur? correct answers ampulla of the uterine tube What is a morula? What day is it formed? correct answers The zygote undergoes rapid mitotic division to create a morula on day 4. What is a blastocyst? What day is it formed? correct answers A blastocyst is formed on day 5 and consists of an embryoblast (inner cell mass) and trophoblast (outer cell mass). When does implantation occur? correct answers 6 days after fertilization (about 1 week). Where does the b...