Why do most zygotes develop after certain amount of embryo is formed?

Q: a. How many spermatozoa does one secondary spermatocyte produce?   b. Where in zygote does the first…

A: The male gamete "sperm" fuses with the female gamete "Ovum" and after this fusion "Zygote" develops.…

Q: If there are 7 spermatogonium that will undergo cell division, how many functional spermatozoa will…

A: Spermatogenesis is the process of production of male gametes(sperms) inside the seminiferous tubules…

Q: Trace the development of megasporocyte into mature ovule.

A: i. A single Megaspore mother cell is differentiated in the micropylar region of the nucleus of an…

Q: What are embryophtes?

A: Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes of the kingdom…

Q: Which of the following structures secretes the hormone that sustains the corpus luteum during the…

A: Corpus luteum is a temporary endocrine structure involved in ovulation and early pregnancy.  The…

Q: Is an zygote a life?

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: How is a zygote formed?

A: Sexual reproduction: It is a type of reproduction that involves the fusion of gametes. It required…

Q: Why does the dispersion or contraction stage of the developmental cycle assume a complex character

A: Family development is a notional methodology for the orientation of the research and set an abstract…

Q: What primary germ layer gives rise to the notochord? What is the function of the notochord?

A: Notochord It is a flexible, rod shaped body found in embryos of all chordates.

Q: Describe the events that follow contact of a spermatozoon with an egg and explain Polyspermy and the…

A: The term "embryogenic development" is sometimes used. This procedure involves the embryo's creation…

Q: What is the zygote stage?

A: The process of embryogenesis and fetal development initiate after the event of fertilization. It is…

Q: 2. Organs develop from a zygote as a direct result of the processes of 1) fertilization and meiosis…

A: Ans: Zygote: The egg cells are fertilized by sperm cells to form the zygote and is also referred to…

Q: What is cephalization? How does lateral symmetry favor cephalization?

A: Symmetry is the balanced distribution of duplicate body parts or shapes within the body of an…

Q: How does the egg get from the ovary to a fallopian tube?

A: Reproduction is essential for the production of the healthy offspring and it is not necessary for…

Q: How big is a zygote?

A: A zygote is a cell that forms as a result of fertilization or fusion of male and female gametes. The…

Q: In terrestrial arthropods, fertilization is always internal (True/False)?

A: Arthropoda is the largest phylum in the animal kingdom, which includes such familiar forms as…

Q: Define the function of ova and avary in female reproductive system of frog?

A: The female reproductive system in frog has a pair of ovaries, a pair of oviducts that open into the…

Q: What happenes if fertilization doesnot takes place in utreus?

A: Humans, as mammals, have the capability to reproduce sexually. Sexual reproduction requires the…

Q: Describe events that follow contact of a spermatozoon with an egg. What is polyspermy and how is it…

A: Fertilization happens when a sperm and an oocyte (egg) combine and their nuclei.

Q: What is ejaculatory duct and its function in cockroach?

A: Cockroaches (Periplaneta americana) fall under the phylum Arthropoda of the class Insecta.

Q: What is the first appearance of embryogenic callus?

A: The callus is basically an unorganized growing mass of parenchyma cells that is responsible for…

Q: Name a mature ovule containing the embryo.

A: The plant embryo is a part of the bud that consists of the earliest forms of leaves, stems, and…

Q: How does the difference in size and cellular contents between spermand eggs relate to their specific…

A: Ovum is the female gamete, in which the cells are rounded spheres and non-motile, and they are not…

Q: Explain how the flat embryonic disc takes on the cylindrical shape of a tadpole.

A: The embryo is the first phase of the development of the offspring. The life cycle starts shortly the…

Q: What is the male reproductive system of frog?

A: Sexual dimorphism is present in frog. During the breeding system, both the male and female frogs…

Q: The ______ carries food and water to the developing zygote.

A: Nutrients are necessary for maintaining the growth of the embryo. In plants, the endosperm is the…

Q: What is the difference between zygote and embryo?

A: The process of embryogenesis and fetal development initiate after the event of fertilization. It is…

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: unfertilized ovum zygote 2 or 4 cell stage 8 cell stage blastula gastrula starfish embryo morula (16…

A: *NOTE: Kindly repost for other question. Dear Student as per the guidelines we are supposed to…

Q: Why do you think the zygote is dormant for sometime in a fertilised ovule?

A: In angiosperm, pollination is the process in which pollens are transferred from the stamen to the…

Q: What is "ecdysis"? O The outermost covering of an ovum that undergoes external fertilization. O A…

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

Q: How is the process of gastrulation accomplished in mammalian embryos?

A: In developmental biology Gastrulation is the process that take place in the early embryonic…

Q: Which ovary is functional in birds?

A: Ovary is the female reproductive organ found in lower chordates to higher animals. Ovary produces…

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 happens if fertilization takes place in utreus?

A: Reproductive system (or genital system) is used for the sexual reproduction. The female attains…

Q: Is a zygote a fertilized egg?

A: Fertilization is the process whereby gametes from each parent fuse to produce a new cell.

Q: The process which prevents a zygote from forming is known by what term?

A: Zygote is a diploid cell formed by fusion of male and female gametes. It is the first cell of an…

Q: What is ripened ovary known as?

A: Plants are mainly multicellular organism, predominantly photosynthetic eukaryotes of the kingdom…

Q: What is the difference between the testes of shark and frog?

A: Testes are the male reproductive organ that is responsible for producing spermatozoa or male…

Q: Name the fully developed part of ovary containing egg.

A: The fully developed part of the ovary containing egg is called Graafian follicle and the associated…

Q: The nucleus of the spermatozoan is found in the centriole axial filament tail head plasma membrane

A: Spermatozoa are also called sperms which are male gametes that carry male's genetic material. These…

Q: After the eighth week of development an embryos is referred to as what?

A: After the 8th week of development, the embryo is referred to as "fetus"

Q: In animal phyla with radial cleavages, cell fate of the embryo is?

A: Radial cleavage is a developmental pattern of embryos where the cell division happens…

Q: Gastrulation occurs to form which three tissues? O hypoblast O ectoderm mesoderm O endoderm O B, C,…

A: During the early stages of embryo development, a multitude of signals are being released, some of…

Q: How does the embryo turnfrom gastrula into neurula?How is the neural tubeformed? What is…

A: The gestation is period refers to the time during which zygote develops to the foetus. The gestation…

Q: why is polyspermy lethal in an egg cell?

A: Polyspermy is defined as the introduction of two or more sperm cells into the cytoplasm of an egg.

Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.