Blastopore becomes mouth Archenteron Mesoderm

Q: Which of the following cell layers is not necessary to be considered a eumetazoan? a. Ectoderm…

A: Eumetazoans are the animals which are characterized by the presence of true tissues organized into…

Q: Protostomes and deuterostomes can be classified based ona. cleavage pattern.b. destiny of the…

A: Metazoans are divided into two, depending upon the embryonic development : Protostomes and…

Q: A genetic change that caused a certain Hox gene to be expressedalong the tip of a vertebrate limb…

A: The genes in the living organisms which determine the positioning of the organs in the bodies are…

Q: What structural adaptation in chickens allows them to lay theireggs in arid environments rather than…

A: The vertebrate embryo requires an aqueous environment for their development. The amphibians and…

Q: The inner cell mass of a human blastocysta. gives rise to the chorion.b. gives rise to the…

A: Cell is the basic unit of life. Based on the number of cells an organism may be prokaryotic or…

Q: Which of the following has three germ layers? (a) morula  (b) gastrula (c) blastula (d) blastocyst…

A: Answer is b.)  gastrula.

Q: A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the…

A: In developmental biology, gastrulation is a stage early in the embryonic development of many…

Q: What conclusion can be drawn from embryological development? Insect and bird wings are similar in…

A: Embryo  It is the structure that if form after the fertilization of egg and sperm.

Q: Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The…

A: The fusion and amalgamation of the male spermatozoa with the ovum of the female are the…

Q: Explain how cephalization, jaw development, and paired limbs guided vertebrate evolution. Include…

A: Evolution is a slow process of changes in species on the genotypic and phenotypic level that leads…

Q: Using vertebrates as an example, how does comparative embryology prove evolution?

A: Evolution is defined as the change in the species’ characteristics over several generations and it…

Q: At what phase of development would a mouse embryo appear me similar to a chick embryo? Blastula…

A: THE STAGE OF DEVELOPMENTIS BLASTULA STAGE.

Q: Suppose you watch a video showing the development of an unknown animal. What clues can the…

A: Animals can be classified based on morphological characteristics (traits that can be observed after…

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: In what chronological order did the following traits evolve? a) First the mesoderm, second the…

A: The correct option is C First the amnion, second the mesoderm, third the notochord and fourth…

Q: . In humans, identical twins are possible because(A) extraembryonic cells interact with the zygote…

A: The identical twins are also referred to as monozygotic twins. This occurs from the fertilization of…

Q: Which statement regarding the differences between frogs and mammals is TRUE when comparing model…

A: Eggs are typically spherical or ovoid with a diameter of about 0.1 mm in humans and 1 to 2 mm in…

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

A: While the cleavage pattern has remained remarkably consistent among taxa, it has undergone numerous…

Q: During embryonic development, unique cell layers develop into specific groups of tissues or organs…

A: The development of a plant or animal embryo is called embryogenesis. This process starts with 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: A A Mesoderm Ectoderm Endoderm In the above diagram, there is an opening that has appeared on the…

A: Developmental biology is the study of the process by which organisms grow and develop.

Q: A) The correct order of chronological order of developmental events is a. 1.cleavage 2.…

A: Since you have asked two questions, we would be answering only the first. Post the second question…

Q: According to this picture of embryos (early developmental stages), which two organisms are most…

A: Between all the organisms, some characteristics are similar and some characteristics are same. Based…

Q: You separate the blastomeres of a four-cell animal embryo and discover that each cell| develops into…

A: The cleavage is the cell division pattern in early developmental phases. It is slightly different…

Q: Using the following list, describe the proper sequence for the events of animal development: 1.…

A: Animal development is occurs in sequential manner.

Q: The zona pellucida is important in mammals because it...

A: The zona pellucida is a thick extracellular layer that covers all mammalian eggs and preimplantation…

Q: All of the following are true about humans EXCEPT: A. our zygote and early embryo cells have…

A: Introduction :- A zygote is a eukaryotic cell created when two gametes fertilise each other. The…

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: Read the following statements and choose the option with only correct statements. (a) Tympanum…

A: Tympanum is the membrane which separate external ear and internal ear. When sound waves rreaches…

Q: If you observed fruit flies with the following developmental abnormalities, would you guess that a…

A: Step 1 Homeotic genes are the master regulators genes that control the development of a particular…

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: a. development of organs

A: 1. Development of organs

Q: In the blanks below, identify the essential developmental process (NOT developmental stage)…

A: The every organism's embryo undergo the different developmental stages so that all the structures…

Q: Please be precise on this question.  Describe how early developmental processes in Eutherian…

A: Eutherian mammals are a group of mammals that have a placenta. This means that the mother and baby…

Q: Which of the following statements is TRUE? A. Animals with indirect development requires external…

A: Correct option is C. Parthenogenesis is a form of sexual reproduction Parthenogenesis is commonly…

Q: The diagram shows various stages of embryonic development in 5 vertebrate species. Which of the…

A: According to the question, the diagram shows various stages of embryonic development in 5 vertebrate…

Q: The egg of a fish is what type of chordate egg and why? a. isolecithal b. telolecithal with total…

A: All fish eggs are surrounded by using an envelope, referred to as the zona pellucida (ZP), that…

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: Observation of the development of embryos in sea stars shows the mesoderm forming pouches bulging…

A: Sea star classification: Kingdom       :      Animalia Phylum          :      Echinodermata…

Q: Which of the following is not true about avian eggs? Choose all possible answers. a. exhibit…

A: In development biology, cleavage is the process (following fertilization) that involves a series of…

Q: An additional notochord is grafted next to the developing neural tube. Answer the following…

A: The neural tube is an embryonic structure that eventually leads to the formation of the brain and…

Q: From which of the following is the embryo developed? a) Trophoblasts b) Blastocoelen c) The…

A: In humans the period of pregnancy is about 39-40 weeks. This is called as gestational period. During…

Q: Which of the following does a fate map of an embryo show? A. differences in developmental potential…

A: Introduction Fate mapping is a technique for determining the embryonic origins of diverse adult…

Q: Which of the following is not true about frogs eggs and blastula formation? Choose all possible…

A: In the blastula stage of development , a blastula contains large yolk filled cells at the vegetal…

Q: Address the items below as they relate to human embryology; a) discuss when the germ layers of…

A: The study of the development and formation of an embryo is known as human embryology. The study of…