What are the three typesof germ layers that formtissues and organs in animals?

Q: How can I distinguish the fates of the splanchnic and somatic portions of the lateral plate…

A: The primary layer of cells that originates during embryo formation is the germ layer. It plays a…

Q: What structure provides oxygen to the growing organism? placenta uterine wall embryonic disk neural…

A: Fertilization is the process of fusion of male and female gametes that takes place inside the…

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: Besides the external reproductive organs, how do male and female domestic animals differ in their…

A: The males and females of a species are different both genotypically as well as phenotypically.

Q: The muscular system develops from which embryonic germ layer? a ) Ectoderm B ) Mesoderm D )…

A: The muscular system is the organ system that comprises of body's muscles. These muscles get attached…

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: What is the difference between a mesoderm and a mesoglea?

A: Diploblastic animals contain body wall which develop from 2 embryonic germ layer - ectoderm and…

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: At what point in embryonic development does the gonadal ridge no longer exhibit bipotential

A: The gonadal ridge stops show double female or male reproductive organs development at a certain…

Q: Endoderm Mesoderm Ectoderm Match the structures below with the correct germ layers listed above…

A: The germ layer: The primary layer of cells. It is formed during embryonal development. The…

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: Define ectoderm and andoderm?

A: Except the sponges, the growing embryo in all animals develops different layers of cells called as…

Q: Describe and label a nematocyst and the cell containing it. Describe how nematocysts fire. How does…

A: Nematocysts are characteristic features of Cnidarians. These specialized cells are used for…

Q: Define(a) Juvenile phase,(b) Reproductive phase,(c) Senescent phase.

A: In many animals, the life cycle of the organism may include many stages like the juvenile phase,…

Q: What is the adaptive significance of having sperm and egg produced at different times?

A: The adaptive significance of producing eggs and sperm at different times is it discourages…

Q: which germ layer (tissue) gives rice to our nervous system and outer coverings. a) endotherm b)…

A: The mesoderm, or middle tissue, gives rise to most of the muscle and connective tissues. Finally 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: 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: Which ovary is functional in birds?

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

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: Why are the ectoderm and endoderm called the “germ” layer?

A: Gastrulation is the process of the embryonic development in which cell  movements establish the…

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: In which type of animalsdoes the placenta exist? Whatis its main function?

A: The placenta is a large organ that develops during pregnancy. It is usually attached to the uterine…

Q: Which of the following primary germ layers nervous tissue develops from? a ) yolk sac b) endoderm…

A: The life of a human being begins in the womb as an embryo and undergoes various developmental stages…

Q: hich structure is the outermost extra-embryonic membrane? A ) Placenta ‘ B ) Yolk sac D ) Chorion

A: An extraembryonic membrane is one among the membranes that assist within the development of the…

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: 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: Name the sex cells of sexually reproducing animal.

A: Sexual reproduction is the production of a new organism in which the male gametes fuse with a female…

Q: What are the major groups of endoparasites?

A: All the biotic and biotic factors in a particular area form the ecosystem. A group of individuals…

Q: Which structure of the following forms the embryonic axis? Primitive streak Notochord Primitive knot…

A: Animal embryonic development, also known as embryogenesis, is the stage of development of an animal…

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: 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.…