Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 33, Problem 5TY
Summary Introduction
Introduction: A body cavity is defined as an internal space within an animal that contains organs. A coelom is defined as a fluid-filled body cavity. In case of animals with a true coelom, the body cavity is completely lined with mesoderm. Such animals are known as coelomates.
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What is NOT true about embryo development?
A. a morula is an earlier stage than a gastrula
B. Gatrulation creates endoderm and ectoderm in most animals
C. Mammal blastulas are called blastocysts due to the thickened area where the embryo develops
D. diploblastic animals have mesoderm
In Deuterostomes, nutrient molecules (monomers) are taken in to the space between the endoderm and the ectoderm because... A) The ectoderm makes protein for movement B) The endoderm cells release hydrolytic enzymes that act on polymers C) The endoderm releases enzymes that conduct dehydration synthesis of proteins D) mRNA polymerase causes hydrolysis of DNA E) All are correct
Explain why
Observation of the development of embryos in sea stars shows the mesoderm forming pouches bulging from the archenteron to form the coelom. From this observation, you can predict that
A.
the cleavage of the embryo is radial.
B.
the adult animal will have bilateral symmetry.
C.
the mouth forms from the first opening in the gastrula.
D.
the animal is diploblastic.
Chapter 33 Solutions
Biology
Ch. 33.2 - Core Skill: Connections Look back to Figure 25.8....Ch. 33.2 - Prob. 2CSCh. 33.3 - Prob. 1CSCh. 33.3 - Prob. 1EQCh. 33.3 - Prob. 2EQCh. 33.3 - Prob. 3EQCh. 33 - Prob. 1TYCh. 33 - Prob. 2TYCh. 33 - Prob. 3TYCh. 33 - In triploblastic animals, the inner lining of the...
Ch. 33 - Prob. 5TYCh. 33 - Prob. 6TYCh. 33 - Prob. 7TYCh. 33 - Naturally occurring identical twins are possible...Ch. 33 - Prob. 9TYCh. 33 - A major finding of recent molecular studies is...Ch. 33 - Fierce debate centers on whether ctenophores or...Ch. 33 - Why was the evolution of a coelom important?Ch. 33 - Prob. 3CQCh. 33 - Discuss the many ways that animals can affect...Ch. 33 - Prob. 2COQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The 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_forwardWhat does the mesoderm have to do with the designation of a true coelom? A)The mesoderm gives rise to the fluid found within the coelom. B)The mesoderm gives rise to the floor of the coelom only C)The mesoderm has nothing to do with the coelom. D)The mesoderm gives rise to the structure of the coelom wall. E)The mesoderm gives rise to the coelom because it develops within the mesodermarrow_forwardThe ribs form from the ________. a. notochord b. neural plate c. neural tube d. somitesarrow_forward
- What is a potential result of injecting notochord tissue into the ventral (bottom) region of the mesoderm of a frog embryo. Group of answer choices A. a tadpole with no dorsal surface B. a tadpole with reversed legs C. a tadpole that never becomes an adult D. a tadpole with two spinal cords and brainsarrow_forwardThe outermost germ layer in a vertebrate gastrula is the____ . a. endoderm c. mesoderm b. ectoderm d. dermisarrow_forwardThe cells that pull the archenteron through the blastocoel in the sea urchin are _____ cells called mesenchyme Group of answer choices A. mesoderm B. endoderm C. meroblastic D. macrolecithalarrow_forward
- The evolution of the three germ layers ( ectoderm, mesoderm, endoderm) in the evolution of complex animals is associated with the Annelids ( Earth worm), the mollusk (clam), and the Cordata (the vertebrates) which are examples of? A) Protostomes and Deuterostomes B) Just the protostomes C) Only the Deuterostomes D) Cnideria E) Proifera Explain whyarrow_forwardWhat are the correct pairings of developing and embryonic structures in the gastrulation of chickens? Multiple answers is possible. If no correct option is given write the proper pairings. a. Epiblast – ectoderm b. Secondary hypoblast – endoderm c. Primary hypoblast – endoderm d. Migrating cells - mesodermarrow_forwardAn unidentified substance (or substances) released from the developing notochord causes the overlying ectoderm to form the neural plate. This phenomenon is known as (a) activation (b) determination (c) induction (d) implantation (e) mosaic developmentarrow_forward
- Provide the (1) description and (2) adaptive significance of the following developmental and body plans. Developmental and body plan Brief description and Adaptive significance a. mesoderm b. segmentation c. tripoblastic d. coelom e. cephalization f. bilateral symmetryarrow_forwardThe jelly like substance found between ectoderm and endoderm in Cnidarians is called the _____. Question 17 options: a) Osculum b) Nematocyst c) Mesoglea d) Choanocyte e) Mesoderarrow_forwardGreetings! Provide an illustration and describe the different types of egg as to the distribution of yolk they contain. Give examples of chordates that have the said type of egg. (a) Alecithal, (b) Meiolecithal, (c) Mesolecithal (d) Polylecithal Thank you very much.arrow_forward
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