What Causes the End of Cleavage in a Frog Embryo?

Q: What are the two types of embryonic folding?

A: In embryonic folding, the flat trilaminar disk turns into a lot of round shape embryos due to the…

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: Is the mammalianembryonic development director indirect?

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

Q: What is delayed implantation? Why is it important in marine mammals?

A: It is a reproductive strategy used by approximately 100 different mammals in seven or eight…

Q: What generates the first differences among cells in an early embryo? And what controls the…

A: Embryonic differentiation refers to the process in which embryonic cells possess specialization and…

Q: How do the shape and structure of the uterus of the fetal pig compare with that of the human?

A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…

Q: What is the rationale behind the cleavage stages undergone by the early embryo?

A: Cleavage: The series of synchronized mitotic cell divisions of the fertilized egg that results in…

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: How do the somites, intermediate mesoderm, and lateral plate mesoderm contribute to embryonic…

A: The early stages in the case of embryonic development start with fertilization. The fertilization…

Q: Define segmentation, and give two examples of segmented structures in the embryo.

A: The science that investigates the processes by which multicellular organisms like plants and animals…

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: 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: What is developmental mechanism?

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

Q: give the Significance  of the ff   Cleavage to embryogenesis       CAMs and Junctional…

A: * cleavage means  division of cells in  embryo . * The cells formes as result of  cleavage are…

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: 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 triggers activation of the egg?

A: The sperm of several species are attracted to the eggs of their own species by the process of…

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

A: The fitness of the organism depends on the early stages of embryonic development, which include…

Q: After fertilization a developing embryos goes through several changes. At about 2-3 days, what is…

A: During fertilization the haploid gametes, that is, sperm from a male and secondary oocyte from…

Q: What are the distinguishable parts of the 72-hour chick embryo? Give at least 5 parts and the adult…

A: Probably the best magical occurrence of nature is the change of the egg into the chick. A chick…

Q: What are the three germ layers formed during gas-trulation, and what are the principal structures…

A: Introduction :- Gastrulation is a process in which an embryo converts from a one-dimensional layer…

Q: Identify the labeled structures in the embryo shown:

A: Archenteron is a structure which is observed in a developing embryo in the Gastrulation stage. It is…

Q: Explain how is the age of the embryo and it's delivery date determined?

A: An embryo is the early stage of development of a multicellular living being. In common, in life…

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: How do we develop from a single fertilized egg cell?

A: Introduction:- Fertilization is the process of haploid gametes fusing together to generate a diploid…

Q: What do you think is the function of cleavage?

A: Cleavage  is defined as  the repeated mitotic division of the zygote resulting in an increasing…

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: How many somites are there in mouse? In chicks? In humans

A: In embryology, a somite is among a series of longitudinal blocklike sections into which the…

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: What is the fate of the four extraembryonic membranes in embryos of placental mammals?

A: Any of the tissues, derived from the fertilized egg, that encase or in any case add to the help of…

Q: What is the technical term for the fertilized egg?

A: The process of fusion of gametes from male and female parents is called fertilization. The sperm is…

Q: What are the characteristics of the cleavage embryo?

A: Answer : Cleavage is the mitotic division in which the daughter cells are formed from the parent…

Q: whar are the meiotic events that could lead to the birth of an individual with either Patau syndrome…

A: The meiotic events causing Patau syndrome, or Turner syndrome in an individual. Introduction: Patau…

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: 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: In frog embryo, How many stage of cleavage can you identify? Discuss.

A: The frog egg is a massive cell, with a vol me over 1.6 million times that of a regular frog cell.…

Q: How many stages of cleavage are there in sea urchin? Discuss.

A: Sea urchins undergo radial holoblastic cleavage.

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: Why do flexion and torsion events occur in the developing embryo?

A: LONGITUDINAL FOLDING (Torsion) produces both head- and tailfolds, or flexion, and creates a cranial…

Q: What is chromosome number of egg?

A: Haploid describes a cell containing a single set of chromosomes present in the cell.  The term…

Q: Does the distribution of Ca21 in an egg correlatewith formation of the fertilization envelope?

A: Calcium plays a very significant role in several life processes that takes place within the body of…

Q: How many egg nuclei will be obtained from 200 megaspore mother cells?

A: Introduction A megaspore mother cell, also known as a megasporocyte, is a diploid cell in plants…

Q: How many stages of cleavage are there in sea urchin

A: Sea urchins go through radial cleavage, like chordates, ascidians, and different echinoderms. Like…

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: It appeared, then, that something in the region of the gray crescent was essential for proper…

A: The amphibian eggs, when divided into two blastomeres along the plane of first division, the cells…

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.

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.