Cells transplanted from the neural tube of a frog embryo to theventral part of another embryo develop into nervous systemtissues. This result indicates that the transplanted cells were(A) totipotent.(B) determined.(C) differentiated.(D) mesenchymal.

Q: List the four primary tissue types of the adult body and identify which of the three primary germ…

A: A tissue is defined as a group of cells which are having a similar structure and are organized to…

Q: Which process involves the shaping of the embryo and cell migration?

A: Developmental biology is the branch of science that includes the studies of a diversity of…

Q: Describe the movement of cells during early development that change an embryo from a blastula to a…

A: To describe: The movement of cells during early development that changes an embryo from a blastula…

Q: What is the chorioallantoismembrane present in theembryonic development ofreptiles and birds? How…

A: The chorioallantois or chorioallantoic membrane abbreviated as CAM is the vascular membrane that is…

Q: At which embryonic event would one be able to first distinguish a diploblastic embryo from a…

A: Answer: In reproduction process after the fertilization of female egg cell with sperm male cell…

Q: Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this…

A: The membrane that is known to assist the developing embryo is known as an extraembryonic membrane.…

Q: What is external cephalic version?

A: External cephalic is a type of external rotation of fetus in utero.The physician rotates the fetus…

Q: Differentiated cells in a developing embryo derive from________.a. endothelium, mesothelium, and…

A: The zygote undergoes the process of cleavage, which is accompanied by cell divisions. Following the…

Q: How are mammalian extraembryonic membranes formed?

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

Q: In a developing chicken embryo, what mesoderm lines the amniotic cavity?

A: The amnion, chorion, yolk sac, and allantois are the four extraembryonic membranes found in amniotes…

Q: How important is cell adhesion for the development of mammalian embryo?

A: The fusion of male and female gametes results in the formation of a single-cell zygote. The zygote…

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: Why do mammalian eggs have a small concentration of yolk, while bird and reptile eggs have a large…

A: Eggs are divided into three types on the basis of the amount of cytoplasm present in them. They are…

Q: What is embryos

A: Introduction  The life starts from single cell called Zygote. A zygote is formed by the fusion of…

Q: Explain the Tissue Stages of Development under Early Stages of Animal Development ?

A: The embryo in an animal develops, the cells start to divide, grow, and transfer in specific patterns…

Q: HUMAN DEVELOPMENT What organs were produced at the start of development? Towards the end of…

A: Human development  allows the human beings to form specialised structures like organs during their…

Q: What are extraembryonicmembranes?

A: The embryology is the study of the formation and development of embryonic structures right from the…

Q: What structural features of the endometrium and myometrium contribute to their functions?

A: Uterus is one of the important organ of the female body. It serves many important functions in the…

Q: Compare the structures of the egg and sperm. What structural modifications do sperm have that…

A: The process of producing new organisms from the pre-existing ones is called reproduction. It may be…

Q: Name the embryonic membranes and give the importance of each

A: Embryonic membranes are the membranes that lead to the development of the embryo in the mother's…

Q: Name the three embryonic tissue layers of vertebrate embryos,and describe the process by which they…

A: Gastrulation is the cycle where differentiated cells from the zygote move to their particular areas.…

Q: Humans have three openings in an analogous place. Why is there a difference in the number of…

A: Hello! Since you have posted multiple questions we are answering only one question here as per the…

Q: What are the cells producedin the first stage of theembryonic developmentcalled?

A: The process in which the embryo forms and develops is known as embryonic development.

Q: What is the cell divisionduring the first stage of theembryonic developmentcalled? How is this…

A: The process by which a parent cell divides into two identical daughter cells, is called Cell…

Q: How does a fertilized egg give rise to an organism with highly differentiated cells that are…

A: Developmental biology is the branch of science that includes the studies of a diversity of…

Q: What are embryonic stem (ES) cells ?

A: Stem cells are cells that are undifferentiated or "blank." This ensures they have the potential to…

Q: How are animals classifiedaccording to the germ layerspresent in their embryonicdevelopment?

A: Germ layers are developed during embryogenesis. They are programmed to develop specific organs,…

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: What determines the antero-posterior polarity in vertebrate embryos?

A: The Anterior-Posterior (AP) axis is an embryonic axis that helps the animals to travel…

Q: In a developing chicken embryo, What is the fate of the post anal gut?

A: Evolutionary developmental biology is considered a new norm in evolutionary biology. It arose from…

Q: Which embryologic tissue develops into the spinal cord (mesoderm/ectoderm/endoderm)?

A: The formation of the embryo is one of the defining features of sexual reproduction. This embryo…

Q: Most mammals, including humans have alecithal type of egg, which means that there is negligible or…

A: In lower organisms the yolk provides the nourishment to the growing embryo. But in mammals the…

Q: ''Because of the many later developmental trans-formations that produce the elaborately structured…

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

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: What happens to the second sperm nucleus, the one that does not fertilize the egg cell? What is the…

A: Sexual reproduction is a fusion of male and female gametes to produce offspring from the zygote.…

Q: What Is maturation?

A: Living organisms include a variety of organisms from microscopic creatures like bacteria and…

Q: How does a simple tube become the complex structures of the brain and spinal cord that generate both…

A: In living organisms, the formation and the development of all the cells and tissues got initiated by…

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: What four types of cellular processes must occur to enable a fertilized egg to develop into an adult…

A: Pattern development is the cycle by which a particular cell, the treated egg, partitions to offer…

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: What is a fertilized egg called?

A: Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete…

Q: What would happen if a blastocyst implanted into the functional layer of the endometrium and a…

A: It is at the blastocyst stage of development that an embryo would normally move out of the fallopian…

Q: The zygote is described as totipotent because itultimately gives rise to all the cells in your body…

A: Introduction The zygote is the fertilized egg,  a single cell formed by the fusion of an egg and…

Q: How can matter alone construct itself into the organized tissues of the embryo?

A: The embryo is the development stage in multicellular organisms. The development of the embryo begins…

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: To what extent has mesoderm migrated in the blastoderm of the 24 hour chick embryo

A: After twenty-one days of incubation, a chick emerges from a fertile egg. On the surface of the yolk,…

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.