Which of the following cell layers is not necessary to be considered a eumetazoan? a. Ectoderm b. Endoderm c. Mesoderm d. All of the above are found in all eumetazoans.

Q: At which stage of embryogenesis, major patterns of the internal tissues of the embryo have been…

A: Embryogenesis It is defined as a process which occurs after the process of fertilization of an…

Q: an amniotic egg was crucial to the evolution of vertebrates because it provides the following to the…

A: The amniotic egg was the crucial evolutionary step that allowed the living organisms to breed…

Q: What two germ layers develop in the embryos of diploblastic animals? Check the two that apply.…

A: The two germ  layers of cells found in diploblastic animals are the outer ectoderm and the inner…

Q: Why is knowing information about embryo development important

A: EMBRYO DEVELOPMENT:- It is the process of formation of the embryo, starts with the fusion of male…

Q: Howw many different cell types would you find at the embryonic stages (cleavage, blastocyst, the…

A: After fertilization, the zygote and its associated membranes referred as the conceptus. During the…

Q: In a developing human, the first organ to form is thea. heart.b. brain.c. notochord.d. liver.

A: Answer- The organs starts to develop from the first month of the pregnancy in the humans.

Q: Which of the following is the correct order for the four developmental phases in animals? A.…

A: Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With few…

Q: The following diagram is of the blastopore stage of embryonic development. Based on the information…

A: Reproduction is the process by which an organism creates more of its own progeny. Reproduction is…

Q: Compare and contrast between the following: (1) Medio-lateral intercalation and radial…

A: The layers of a human embryo, from innermost to outermost, are the endoderm, mesoderm, and ectoderm.…

Q: Along the notochord, segmented blocks of tissue that give rise to muscles, vertebrae, and connective…

A: Answer is d.) somites.

Q: Name two structures derived from each of the three embryonic tissue layers: endoderm, ectoderm, and…

A: Two structures derived from each of three embryonic tissue layers are : Endoderm  gives rise to…

Q: Which of the following consists of both fetal and maternal tissues? (a)umbilical cord (b) placenta…

A: The unborn offspring that is known to develop from an embryo is called the fetus. The overall…

Q: Write in detail the process of organogenesis in vertebrates. Give one example and make diagram also.

A: In embryology, Organogenesis can be described as a series of processes that lead to converting the…

Q: A body cavity fully lined with tissue derived from mesoderm is called a______ . a. coelom c.…

A: Mesoderm can be defined as the germ layer that is present in animal embryos  will give rise to the…

Q: Nematocysts are  a.) reproductive cells b.)excretory organs c.) set of muscle cells d.)…

A: Answer  (e). Defensive cells

Q: The ribs form from the ________. a. notochord b. neural plate c. neural tube d. somites

A: The process by which cells of blastula get arranged to form germ layers is called gastrulation. The…

Q: The outermost germ layer in a vertebrate gastrula is the____ . a. endoderm c. mesoderm b. ectoderm…

A: BASIC INFORMATION  FERTILIZATION  It is the process of the fusion of the male as well as the female…

Q: In a reptile egg, the extraembryonic membrane thatencloses the embryo in a watery environment is…

A: Answer is b.) amnion.

Q: A baby born four weeks before its due date is most likely to have anunderdevelopeda. central nervous…

A: The central nervous system begins developing two weeks after fertilization and continues developing…

Q: Eventually the amniotic cavity is surrounded by a double-layered membrane called the…

A: The amniotic cavity is the cavity which is the closed sac between the embryo and the amnion and…

Q: In animals, a key difference between spermatogenesis andoogenesis is thata. only oogenesis involves…

A: Reproduction refer to a biological process in which new organisms are produced from their parents.…

Q: What is/are major tissue that develops from ectoderm (select all correct answers)? O Nervous system…

A: During sexual reproduction, a haploid sperm fuses with a haploid egg to give rise to a diploid…

Q: Label each tissue with the specific source germ cells: v Gastrointestinal tract A. Intermediate…

A: We are tripoblastic organisms that means we contains three types of germ layers that includes…

Q: Which of the following statements about gastrulation is correct? A. During gastrulation, the…

A: The embryonic development after 15 days of fertilization marks gastrulation.

Q: You find a flatworm during a field trip and discover that the embryos undergo spiral cleavage. What…

A: The daughter cells are positioned in the grooves of the parent cells in a spiral division. The…

Q: Why are the ectoderm and endoderm called the “germ” layer?

A: Gastrulation is the process of the embryonic development in which cell  movements establish the…

Q: All of the cell types of an adult vertebrate develop from three primary embryonic germ cell layers,…

A: The three germ layers: ectoderm, mesoderm, and endoderm give rise to various tissues. The ectoderm…

Q: If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface…

A: The gastrula formation occurs during the early stage of cell development. During gastrulation the…

Q: Which tissue type or organ is correctly matched with its germ layer tissue? A) nervous–mesoderm B)…

A: Introduction :- The mesoderm is a germ layer that develops between the ectoderm, which produces skin…

Q: In a diploblastic animal, which tissue layer would be missing? mesoderm ectoderm periderm endoderm

A: The branch of science which deals with the study of tissues is known as Histology. Cells are the…

Q: what is the importance of animal reproduction in our society? What will be the impact in our lives…

A: Reproduction is also reffered to as procreation. This process is the biological manner via which…

Q: Explain the following terms: ectoderm, endoderm, mesoderm and stem.

A: Animal phylogeny is a rapidly changing field. The biologists mostly depend on the fossils to compare…

Q: Fill in the blank: Eventually the amniotic cavity is surrounded by a double-layered membrane called…

A: Introduction: Fetal development undergoes a series of steps. To protect the fetus from any injury…

Q: Which of the following extra-embryonic membranes becomes the embryonic portion of the structure…

A: Extraembryonic membrane are the extra membrane that are formed outside the growing embryo . There…

Q: The diagram below represents one stage during the human reproductive process. Fetus A- A function of…

A: Implantation is the process by which the blastocyst or fertilized egg attaches to the uterine wall.…

Q: Which mechanism prevents an ovum from being fertilized by multiple sperm cells? A. Once a sperm…

A: An egg should be prepared by only one sperm in particular. To forestall polyspermy, the zona…

Q: From which of the following is the embryo developed? Trophoblasts Inner cell mass Blastocoelen…

A: Embryo is formed from the  zygote and zygote is formed by the union of the male and female gametes.…

Q: What is NOT true about embryo development? A. a morula is an earlier stage than a gastrula B.…

A: Zygote is a structure formed by the fusion of male and female gamete. The stage of development of…

Q: Match each structure with its description.___ cloaca                   a. adjusts buoyancy___ swim…

A: Any biological thing which takes up space and is distinct from its environment is referred to as an…

Q: a. development of organs

A: 1. Development of organs

Q: One of the characteristics unique to animals is(A) gastrulation.(B) multicellularity.(C) sexual…

A: Organisms are open systems that maintain homeostasis, are composed of cells, have a life cycle,…

Q: How can one cell give rise to different types of cells

A: * As we seen our life begins with a single cell and it will leads to formation of organs and tissues…

Q: Which of the following correctly lists the germ layers of an embryo? O A. exoderm, mesoderm,…

A: Step 1 Embryonic development or embryogenesis is the development of the embryo from the fertilized…

Q: During morphogenesis, gastrulation does which of the following? A. Gastrulation produces the…

A: Several stages are involved in the development of a baby from a zygote during pregnancy. It begins…

Q: The Embryonic stem cells can be derived from _______ which is developed by  “invitro…

A: The egg cell fuses with the sperm cell to form the zygote. The zygote develops into an embryo where…

Q: Fill in the blank:  The embryonic membrane that is attached to the edge of the embryonic disk and…

A: An embryonic membrane is a type of membrane that originates from the fertilized egg cell, and are…