At which stage of embryonic development does the embryo have a blastopore?   Group of answer choices A.Blastula B. Zygote C. Morula D. Gastrula

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: 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: Identify the characteristics of protostome development: Select one or more: O spiral cleavage…

A: Protostomes are organisms which shows formation of mouth before formation of anus during embryonic…

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: 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: 13 - Chambered heart occurs in:   A) Leech B) Earthworm C) Snail D) Cockroach

A: The heart performs the function of pumping blood to the different parts of the body. Different…

Q: Contrast developmental activities in embryos before and after they reach the mid-blastula…

A:

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

A: Answer is d.) somites.

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: Which statement is true of Spemann’s organizer?a. It is unique to amphibian embryos.b. It arises…

A: Answer is a.)  it is unique to amphibian embryos.

Q: Which of the following is develops into the archenteron? A. the placenta B. the endoderm C. the…

A: Placenta is an organ which helps in providing oxygen and nutrients to growing baby and removal of…

Q: Internal and external fertilization differ in that species thata. produce an amniotic egg have…

A: The external fertilization process usually takes place in an aquatic environment where the male and…

Q: postanal gut?

A: Introduction  Take out of digestive Cdx2 produces various results relying on the formative stage at…

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: 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: Characteristics that evolved in birds to allow for flight includea. reptilian-like scales on the…

A: Bird anatomy has unique adaptations mainly in flight. These are light weighted organisms with very…

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: The process of gastrulation forms the _______. a. blastula b. zygote c. organs d. germ layers

A: Embryogenesis refers to a process in which the development of an embryo takes place. An embryo can…

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: Which of the following extra-embyonic membranes become the embryonic portion of the structure…

A:

Q: Draw an egg in its blastula stage and label the parts. What are its distinguishing charcteristics…

A:

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: Discuss the Distinguish the formation of cleavage snails embryos. 2. Distinguish the formation of…

A:

Q: . discuss the difference between the life stages of Ascaris lumbricoides and T. trichuira

A: DISCLAIMER Since you have asked multiple questions, we will solve the first question for you. If you…

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: What was important about the development of the egg as a part of the reproductive cycle of animals?…

A: Yolk formation in humans

Q: Embryo above pictured here is a/an O A. blastula O B. gastrula O C. planula O D. zygote

A: Human embryonic development refers to the development of embryo. It involves the process of cell…

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: 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: The ___________________ of an egg serves as an embryos water supply while the ____________ provides…

A: The correct option is C) albumen; allantois

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: 1. Discuss the formation of cleavage of sea urchin 2. Discuss the formation of gastrulation of sea…

A: Sea urchins show radial holoblastic cleavage. The first and the second cleavages are both meridoneal…

Q: extra-embryonic

A: An extraembryonic membrane is one in every one of the membranes which assist within the…

Q: Part IlI: Discussion 1. How can you distinguish an unfertilized egg from a fertilized egg? 2. As…

A: Fertilization is a natural phenomenon of producing mature male(sperm) and female(egg) gamete in…

Q: Which form of reproduction is useful to an animal with little mobility that reproduces sexually? a.…

A: Answer is d.)  hermaphroditism.

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: At which of the following stages of development is a frog embryo composed of the most cells? Group…

A: The different stages of development in a frog are: Zygote→Morula→Blastula→Gastrulation begins→Embryo

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: The folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer…

A: In humans, the folding of neuro-ectoderm gives rise to one of the most important structure i.e…

Q: During the embryonic developmen, the trophoblast will developed into  Select one: A. The embryonic…

A: Developmental biology focuses on the study of developmental sequences of organisms. The embryonic…

Q: Match the term to the correct description. + Allantois A. Fluid-filled membrane that protects the…

A:

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: Amniotic eggs, compared to non-amniotic eggs, are a useful adaptation for

A: Amniotic eggs have  extra-embryonic membranes such as amnion ,chorion and allantois which have…

Q: Explain: Is the degenerating blastocoel visible in the frog gastrula? How much yolk protrudes…

A: Introduction :- In early mammalian embryos, a blastocoel is a chamber that is filled with fluids,…