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

Q: Name the process of development of egg into young one without fertilization?

A: The above-mentioned definition is true for parthenogenesis. It is a type of asexual reproduction…

Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…

A: Answer

Q: Are all of the cell nuclei in the embryo sac haploid or is just the egg haploid?

A: The group of organisms with eukaryotic cells having cell walls and autotrophic nutrition are called…

Q: Why is knowing information about embryo development important

A: EMBRYO DEVELOPMENT:- It is the process of formation of the embryo, starts with the fusion of male…

Q: What are embryophtes?

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

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

A: The embryo is the early stage of the development of multicellular living beings. A fertilized egg…

Q: Is the mammalianembryonic development director indirect?

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

Q: Which process occurs between the zygote and the embryo stage

A: Fertilization is the process of fusion of the male gamete and the female gamete, resulting in…

Q: hat parts are persistent throughout the development of the sea urchin embryo? Why are these present…

A: A multicellular animal arises from a single cell a fertilized egg. During development ,the cell…

Q: Name the third tier of embryonal cells in pinus formed.

A: All plants come under the kingdom Plantae. They are eukaryotes, multicellular, and having cell…

Q: What is embryos

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

Q: Compare and contrast embryogenesis and morphogenensis and Outline the difference of somatic…

A: Embryo  Embryo is the developing young one of multicellular organisms.

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: 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: Draw the chromosomes in the zygote (cell after fertilization) egg cell fertilization sperm cell

A: Sperm cell is the male gamete and egg cell is the female gamete. Gametes are haploid in nature. Male…

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: 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: What is meant by the term “activation” in embryology?

A: Embryology is a branch of biology. It is the study of formation, growth as well as the development…

Q: Why are sea urchins have external fertilization? What are the adaptive advantages of external…

A: Sea urchins are significant herbivores on coral reefs, & in certain environments they assume a…

Q: What is developmental mechanism?

A: In biology, a mechanism is a system of causally interrelated elements and processes that result in…

Q: Embryo above pictured here is a/an

A: An embryo is the first stage of a cellular organism's development. Embryonic development is the…

Q: Briefly discuss the important events occurring during gastrulation and neurulation in avian…

A: Gastrulation is a process during embryo development where the zygote undergoes cleavage and forms a…

Q: Compare and contrast the mechanisms of egg activation in internal versus external fertilization.

A: Fertilization is part of sexual reproduction, responsible for the fusion of gametes. In case of…

Q: Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?

A: During fertilization, sperm-induced rise in cytoplasmic Ca2+concentration.

Q: What is meant by “induction” in embryology? Describe the famous organizer experiment of Spemann and…

A: Embryonic development refers to the development and formation of the embryo. It is characterized by…

Q: . How does the fertilization envelope form in sea urchins?What is its function?

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

Q: Is the sulcus limitans present at the 72-hour stage? State the derivatives of the sacculus and

A: Embryo development is a process that occurs after the process of fertilization has occurred and the…

Q: Poor embryonic development occurs because ____________________________.

A: After fertilization, a single celled diploid zygote is formed, which later develops into…

Q: How is embryology different from developmental biology?

A: During their life cycles;most of the living organisms like plants and animals undergoes various…

Q: Ectodermal Derivatives of the Developing Chick Embryo   A. 33-hour Chick Embryo Transverse…

A: 1. Neural  is situated in the region of or on the same side of the body as the brain and spinal cord…

Q: What is developmental biology?

A: Introduction Biology is the study of life as a science. It is a broad-ranging natural science with…

Q: are the essential similarities and differences between the development of sperms and eggs in mammals

A: Both sperm and ovum are haploid having 'n' number of chromosome.  Both undergoes mitosis as well as…

Q: From which of the following is the embryo developed? Trophoblasts Inner cell mass Blastocoelen…

A: Embryo is formed from the  zygote and zygote is formed by the union of the male and female gametes.…

Q: What result would Jost have obtained if female development alsorequired a signal from the gonad?

A: Endocrine system is a regulatory system of ductless glands that secrete chemical messengers called…

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: How does von baer's law of development relates with the development of the frog embryo? evidences?

A: Von Baer's laws of development These are rules proposed by Karl Von Baer. The laws demonstrates the…

Q: Is a zygote a fertilized egg?

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

Q: What are the consequences of the differences in the yolk amount and distribution of eggs among…

A: The amount and distribution of yolk inside the egg decides the pattern of cleavage. The type of…

Q: What other developmental hallmarks are often associated with spiral or radial cleavage?

A: Based on the directions and angles the cleavage furrow cuts, cleavage is of four types, namely,…

Q: The embryo below exhibits cleavage. radial bilateral spiral O modified

A: During developmental periods single cell zygote is transform into multicellular embryo by the…

Q: The order in which the physiological stages occur during embryonic development is and

A: The fusion of haploid male gamete(sperm) and female gamete(egg/ovum) to form diploid zygotes is…

Q: What is indirect development?

A: Development involves the functional and physiological maturation of an individual. It is a…

Q: What is the relationship between meiosis and fertilization?

A: Meiosis is a sort of cell division that occurs in sexually reproducing organisms' germ cells and is…

Q: The Embryonic stem cells can be derived from _______ which is developed by  “invitro…

A: The egg cell fuses with the sperm cell to form the zygote. The zygote develops into an embryo where…

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…