The end product of cleavage is a __________.
- a. gamete
- b. blastula
- c. gastrula
- d. zygote
Concept Introduction: Cleavage is a process of repeated mitotic divisions where the enormous amount of cytoplasm is distributed to form several small cells. Cleavage is a part of development.
Answer to Problem 1SQ
Correct answer: The end product of cleavage is a blastula. Therefore, option b. is correct.
Explanation of Solution
Reasons for the correct statement:
The sperm and egg unite to form the zygote. The zygote then undergoes several mitotic divisions repeatedly. These repeated mitotic divisions are collectively called as cleavage. At the end of cleavage the blastula is formed. The blastula has a covering called as blastoderm and the cavity inside called as blastocoel. The blastula is made of cells called as blastomeres. The size of the blastula varies from species to species.
Option b. is given as “blastula”
As blastula is formed at the end of all cleavage divisions, option b. is correct.
Reasons for the incorrect statements:
Option a. is given as “gamete”. The gamete is produced at the end of gametogenesis not cleavage. Therefore, option a. is incorrect.
Option c. is given as “gastrula”. At the end of cleavage, the blastula is formed first and then the gastrula is formed.
Therefore, option c. is incorrect.
Option d. is given as “zygote”. The zygote undergoes cleavage to form the blastula.
Therefore, option d. is incorrect.
Hence, options a., c., and d. are incorrect.
The end product of cleavage is a blastula. The cleavage is of various patterns based on which the development of the animal is determined.
Want to see more full solutions like this?
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Additional Science Textbook Solutions
Biological Science (6th Edition)
Laboratory Manual For Human Anatomy & Physiology
General, Organic, and Biological Chemistry - 4th edition
SEELEY'S ANATOMY+PHYSIOLOGY
Biology: Life on Earth with Physiology (11th Edition)
- Endoderm, Mesoderm, and Ectoderm are formed during ________. a. Gametogenesis b. Cleavage c. Gastrulation d. Organogenesisarrow_forwardContact with the zona pellucida triggers ___________, causing sperm to release digestive enzymes that break down the ___________. Group of answer choices a. capacitation/corona radiata b. capacitation/zona pellucida c. the acrosome reaction/zona pellucida d. the acrosome reaction/corona radiataarrow_forwardThe foramen ovale causes the fetal circulatory system to bypass the ________. a. liver b. lungs c. kidneys d. gonadsarrow_forward
- 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 stagearrow_forward24. Unfertilized egg, thickened the uterine wall and blood discharges in the vagina as _______________ * a. Ovulation b. Fertilization c. Menstrual cramps d. Menstruationarrow_forwardMatch the structures found in the fetal circulation with what each fetal structure becomes after birth: _____ Foramen ovale a. Ligamentum venosum _____ Ductus arteriosus b. Fossa ovalis _____ Ductus venosus c. Ligamentum arteriosarrow_forward
- Which of the following rows correctly completes the following sentence? ______A_____ occurs during fetal development when an embryo is not exposed to adequate levels of ____B___ _______ during neurulation. Select one: a. A B Malformation of the limbs Thalidomide b. A B Spina bifida Vitamin B12 c. A B Anencephaly Folic acid d. A B Microcephaly Zika virusarrow_forwardThe thickness of a female’s endometrium changes in response to other events. What event is indicated by the arrow? A. implantation B. Menopause C. Ovulation D. menstrual flow D. A Healthyarrow_forwardEctodermal cells of the developing embryo give rise to_____________ . a. bone tissue b. the kidneys c. the lining of the urethra d. the epidermisarrow_forward
- Gamete formation results in __________________________. a. the pairing of homologous chromosomes b. offspring that are genetic clones of the parent c. asexual reproduction d. the fusion of gametes. e. offspring that are genetically distinct from each otherarrow_forwardCombination birth control pills exploit the _______________-feedback effect _______________ has on _______________ to prevent follicle maturation. a. positive; GnRH; progesterone b. positive; estrogen; GnRH c. negative; progesterone; GnRH d. negative; estrogen; GnRHarrow_forwardChemicals that affect certain body organs a. testosterone b. hormones c. estradiol d. inhibinarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education