''In the early cleavage stages, when the embryocannot yet feed, the developmental program is driven andcontrolled entirely by the material deposited in the egg bythe mother.'' Explain why or why not.

Q: What is the importance ofthe uterine glycogen-producing glands?

A: Uterine glands or endometrial glands are tubular glands, lined by ciliated columnar epithelium,…

Q: Y Why is fetal Hb essential for the survival ofplacental animals?

A: Hemoglobin is an oxygen transport protein in mammals. It is made up of four subunits. Adult…

Q: Is the mammalianembryonic development director indirect?

A: The process of embryonic development is otherwise known as embryogenesis. Fertilization is the…

Q: In a maximum of 15 sentences, explain the developmental processes that will happen to the fertilized…

A: Did you know that there were almost four million babies born in the United States in 2014? The birth…

Q: ''As development progresses, individual cellsbecome more and more restricted in the range of cell…

A: Cells are the basic unit of life. They are often known as "building blocks of the body" and exhibit…

Q: Explain the Human embryo at beginning of fifth week ?

A: The time between conception and birth of a baby is called the gestation period. A normal gestation…

Q: ___________________ fluid protects the embryo from jarred movements and provides a watery…

A: The embryo inside the womb of the mother grows in a sac like bag called the amniotic sac.  It allows…

Q: What are the mainsubstances transferred fromthe mother to the fetusthrough the placenta? Andfrom the…

A: The placenta is the connecting link between the fetus and the other. It is generally found in the…

Q: Why does a mouse embryo develop faster than a human embryo, for example?

A: The similarities between humans and mice permit the study of the development of humans and their…

Q: What is the differencebetween amnion and chorion?

A: Both amnion and chorion are present during a woman’s pregnancy and are part of the extra embryonic…

Q: If it takes just one sperm to fertilize an egg,why do males make so many?

A: During fertilization, the head of sperm binds to the zona pellucida layer of egg and induce acrosome…

Q: Describe the major events that transform a fertilized egg into an embryo?

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

Q: Why must animals be modifi ed in the embryo stage?

A: In this question, we will discuss the fundamentals of how humans have learned to manipulate genetic…

Q: Somites, in the embryo, give rise to muscle. Is the statement above true or false?

A: Somites are found around neural tubes in the embryonic stage of a vertebrate. Somites are made up of…

Q: What are extraembryonicmembranes?

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

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: Fill in the blank:  When a primary oocyte divides, a secondary oocyte and a(an)…

A: Oogenesis is a growth process in which the primary egg cell  becomes a mature ovum. The oogenesis…

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: Identify the structures of an egg and a sperm that aredirectly involved in fertilization.

A: Fertilization is that the method by that the male and also the female gametes (sperms and therefore…

Q: Describe the events that occur following fertilization ofthe oocyte and the process of implantation…

A: The menstrual cycle of a woman repeats itself every 28 days and consists of four phases namely the…

Q: What mechanisms have evolved in animals with(a) external fertilization and (b) internal…

A: The process that involves fusion of the male and female gametes namely sperm and ovum respectively…

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: How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to…

A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…

Q: After the blastula stagewhat is the following stage ofthe embryonic development?What is the passage…

A: The process by which the embryo forms and develops is known as embryonic development. It includes…

Q: What is the differencebetween spermatids andsperm cells? What is the nameof the transformation…

A: Male reproductive organ involves testes, scrotum, spermatic ducts, and prostate glands. Testes…

Q: If Ca2+ from the egg’s endoplasmic reticulum is responsible for the cortical granule reaction and…

A: Reproduction is the process of production of own kinds.

Q: How long after ovulationmust fecundation occur to beeffective?

A: All the living cells need to divide and reproduce in order to grow and develop further into complex…

Q: Are the extraembryonicmembranes the same in allvertebrates?

A: An embryo is an early phase development for an unborn baby. A small fertilized egg divides and grows…

Q: Occasionally, two primitive streaks form in one embryonic disk. Predictthe result. What happens if…

A: Primitive streak : A primitive streak is defined as a transient structure that forms during the 15…

Q: Where does the fertilization of a human egg normally take place?

A: Fertilization is the process of combining haploid gametes (egg and sperm) to produce a diploid…

Q: what is celluar cleavage thats occur in the early stages of development?

A: The development of an embryo is characterized by the process of cell division and cellular…

Q: What is the significancw of cleavage in early development? Discuss.

A: The repeated mitotic divisons of the fertilized egg (zygote) is called cleavage. It is preceeded by…

Q: What are thepredominating chemicalcompounds respectively ineggshell, white and yolk?

A: Egg contains three parts: egg shell, egg white and egg yolk. The shell contains the viscous liquid…

Q: Why are the cell movements (i.e. invagination, involution, epiboly) important in proper development…

A: The study of embryo development is known as embryology. This covers the transformation of a…

Q: What means to retain the ability to become any cell type—including germ-line cells and gametes—when…

A: Stem cells are the cells that are capable to convert to different cell types. These are present in…

Q: In the 33 hr. chick embryo stage what structure/s would serve as a guide to approximately…

A: Auditory vesicles are distinct. Three pairs of arterial arches arise from the ventral aorta. Somites…

Q: n your own words: Expound how the mass of inert yolk influences gastrulation in amphibians,…

A: In evolutionary biology, evolutionary developmental biology is considered a new norm. It developed…

Q: What generalizationscan you make aboutthe location ofmesoderm, whenpresent, during andafter…

A: Embryology is about the study of zygote and embryonic and organ development in plants and animals.…

Q: From what the amnion of mammalian embryo is derived?

A: Amnion is an extraembryonic membrane also known as fetal membrane along with chorion, allantois, and…

Q: What are the defferent mechanism the egg employed to ensure that only one sperm cell will fertilize…

A: Polyspermy is a fatal condition in which several sperm nucleus engage with the female nucleus.…

Q: In northern latitudes, a variety of birds and mammals createstorage depots of food, termed caches,…

A: Physiology of development The study of functional qualities at various phases of an individual…

Q: How is and egg (oocyte) prepared during oogensis for fertilization? Why is preparation essential to…

A: The process of formation of gametes is known as gametogenesis. In females, oogenesis is a process of…

Q: During embryogenesis, how do segments become different that one another?

A: The process of forming and developing an embryo from a zygote (zygotic embryogenesis) or a somatic…

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 happens in the process of fertilization in animals and humans?

A: The cells of the biological unit of life. the cells comprise tissues which collectively forms an…

Q: During which of the 3 stages of oogenesis does the oocyte nucleus move?

A: Oogenesis- Oogenesis is the process of formation of female gametes. This process begins inside the…

Q: Describe the roles of the four extraembryonic membranes.

A: Introduction :- One of the membranes that aid in the development of the embryo is the extraembryonic…

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,…