In protostomes and deuterostomes, the space between the endoderm and the ectoderm is important because: a) it provides a perfect environment that can be maintained for all the cells even if the outside environment change b) protostomes use their ectoderm to develop digestive organs inside it c) deuterostomes develop their brain from the mesoderm in this space d) the endoderm forms the immune system in this space, e) all are important.

Q: How is the mesoderm(third germ layer) oftriploblastic animals formed?

A: The germ layers develop early in embryonic life, through the process of gastrulation. Triploblastic…

Q: How are mammalian extraembryonic membranes formed?

A: The layers encircling the embryo inside the uterus are known as extraembryonic membranes. The…

Q: what is the name of the structure where gastrulation begins in each animal below. Frog and fish has…

A: Gastrulation is the process of the formation of the child inside the womb, the complete development…

Q: What are the archenteron and the blastopore? What is the stage of the embryonic development in which…

A: Gastrulation is the phase in the embryonic development of animals. During this phase, the blastula…

Q: A deuterostome has what type of cleavage Group of answer choices A. spiral, indeterminate at 8…

A: Deuterostomes class include echinoderms, chordates etc.

Q: What is the difference between a mesoderm and a mesoglea?

A: Diploblastic animals contain body wall which develop from 2 embryonic germ layer - ectoderm and…

Q: Component of bilaminar germ disc: a.Hypoblast and endoderm b.Epiblast and hypoblast c.Epiblast and…

A: INTRODUCTION       In the inner cell mass the bilaminar embryonic disc may formed two layers of…

Q: If activity of the organizer is inhibited, what does the embryo become? A mass of notochord. A mass…

A:

Q: Which of the following mammalian structures is derived from one of the extra embryonic membranes?…

A: Introduction An extraembryonic membrane is one of the membranes that aid in embryo development. Such…

Q: Which of the following rows correctly identifies the development of the germ layers? Select one:…

A: The germ layers are an embryonic collection of cells that aid in the creation and development of…

Q: Why are blastomeres in the pigmented part of the egg smaller and more numerous than in the…

A: The other terms associated with developmental biology include embryogenesis or embryology. This…

Q: Enumerate the types of morphogenetic movements employed by vertebrate embryos in gastrulation. Give…

A: Gastrulation is a process that takes place in the early developmental period. In this process a…

Q: What are the molecules being secreted by the organizer in a regional fashion such that the first…

A: Development of embryo -- The development in developmental biology gave a milestone by the discovery…

Q: Which of the following rows correctly identifies the development of the germ layers? Select one: a.…

A: We need to find which of the four options gives the development of germ cells. Endoderm- It is a…

Q: What is the role of segmentation and tagmatization in the evolutionary success of the arthropods?

A:

Q: In a developing Chicken embryo, what is the fate of the postanal gut?

A: Postanal gut is the the extreme end of the alimentary canal.

Q: Why is it immoral to culture headless embryos when in fact it can help to help people who need organ…

A: Murder of an individual is considered immoral. On similar terms, an embryo which is cultured to be…

Q: In amniotes the space around the auditory ossicles in the middle ear cavity is filled with _______.…

A: The collection of vertebrates that lays their eggs on the land instead of water, or have their fetus…

Q: Describe the development of the notochord. Include the terms primitive pit, notochordal process,…

A: The Notochord is a cartilaginous skeleton that supports the body in the form of a rod. It is found…

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: In what ways do a bull’s reproductive organ structures differ from that of the human? How are the…

A: The reproductive system(male and female) is a complex system with a number of interconnected…

Q: Recent fossil evidence shows a placoderm with a developing embryo inside its body. In the absence of…

A: The fossil, Materpiscis attenboroughi, which is related to placoderms in Devonian period, showed the…

Q: Match the terms in column A with the descriptions in column B. Column A a. blastocystb. chorionic…

A: Developmental Biology is the field of biology that studies the processes by which multicellular…

Q: What is the distinguishing characteristic of each stage in the embryonic development of the sea…

A: Sea urchins are marine invertebrates that show in vitro fertilization where male and female sea…

Q: Describe embryonic gastrulation in protostomes vs. Deuterostomes

A: Protostomes:  The clade of animals originally thought to be characterised by the formation of the…

Q: What are the four extraembryonic membranes of amniotic eggs of birds and other reptiles and what is…

A: Step 1 Extraembryonic membranes are those membranes that surround the embryo of terrestrial…

Q: In protostomes and deuterostomes, the space between the endoderm and the ectoderm is important…

A: The space between the endoderm and the ectoderm is important in the evolution of protostomes and…

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: What is the importance of sensory cephalization in animal survival?

A: Cephalization is the process in animals by which nervous and sensory tissues become concentrated in…

Q: Which of the following organisms would NOT undergo gastrulation? a. fungi and sponges b. worms and…

A: ANSWER Which of the following organisms would NOT undergo gastrulation? a. fungi and sponges

Q: How are the oral and anal cavities differentiated in the intact, adult earthworm? The anal cavity…

A: Earthworm is an invertebrate. They are tubular, macroscopic organisms belonging to the phylum…

Q: What structures are derived from the ectoderm, mesoderm, and the endoderm?

A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…

Q: While the aminotic egg offers many advantageous, it also has limitations. Which of the following is…

A: The evolution of the amniotic egg is one of the most important evolutionary steps which leads to the…

Q: In a developing chicken embryom, what is the fate of the postanal gut?

A: A postrectal extension of the embryonic hindgut to the cloacal membrane where the anal opening forms…

Q: Distinguish two mechanisms by which flatworms supply yolk for their embryos. Which system is…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: Which of the following is true about Sea urchin blastula formation and fate map? a) ectoderm that…

A: Sea urchins are spiny, round echinoderms in class Echinoidea. They show external fertilization and…

Q: Which of the following statements is correct for all amniotes?   A. They have internal…

A: They include reptiles, birds and mammals. They have three membranes amnion, chorion and allantois…

Q: Which of the following rows correctly identifies a difference between blastocysts and morula? Select…

A: In fertilized egg, the egg undergoes repeated cell division which occurs rapidly to form a…

Q: What are homeotic genes and what is the “homeobox” contained in such genes? What is the function of…

A: A group of genes that control the pattern of body formation during the early development period of…

Q: What is the food needed by dogs? How do they obtain their food? How do they perform reproduction?…

A: Dogs are the organisms that belong to the kingdom animalia and to the class mammalia. Dogs are the…

Q: Where does the embryo get oxygen and release carbon dioxide? Hint: Where do vascular systems come…

A: From the given question, the given embryo is assumed to be bird’s embryo.The early stage of the…

Q: oblast becomes the: ___________________ 2. The hypoblast becomes the: ____________________ Provide…

A: The  hypoblast become 1. extraembryonic mesoderm 2. Yolk sac

Q: In a chicken embryo, What is the double membrane separating the pharyngeal pouch and furrow?

A: The animal body is a very complex creature made up of several systems. Each system in the body has a…

Q: Which of the following structures give rise to pharyngeal (branchial) arches cranial nerves O Neural…

A: Introduction :- Pharyngeal arches are two structures that grow on either side of the growing…

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…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.