Q: Is the embryonicdevelopment in birds direct orindirect?
A: Animal developmental process can be direct or indirect. Direct development: It refers to the…
Q: Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?
A: Cnidarians, also known as coelenterates are mostly marine organisms and includes corals, hydras, and…
Q: What two germ layers develop in the embryos of diploblastic animals? Check the two that apply.…
A: The two germ layers of cells found in diploblastic animals are the outer ectoderm and the inner…
Q: What are embryophtes?
A: Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes of the kingdom…
Q: Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this…
A: The membrane that is known to assist the developing embryo is known as an extraembryonic membrane.…
Q: What are the characteristics of the anamniotes which differentiate them from amniotes?
A: Amniotes are the vertebrate organisms that includes reptiles, birds and mammals. They are the…
Q: How are mammalian extraembryonic membranes formed?
A: The layers encircling the embryo inside the uterus are known as extraembryonic membranes. The…
Q: In a developing chicken embryo, what mesoderm lines the amniotic cavity?
A: The amnion, chorion, yolk sac, and allantois are the four extraembryonic membranes found in amniotes…
Q: How do the location and the relative size of the bulbourethral glands of the fetal pig compare with…
A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…
Q: astrulation, are there any evidences of cephalization? Why or why not?
A: Gastrulation: During gastrulation, cell motions cause the embryo to reorganise massively,…
Q: What do you call the movement in which the yolk plug is formed in amphibians?
A: Introduction:- The residual patch of endodermal cells generated after the formation of the dorsal…
Q: segments of mesoderm that will form muscles are?
A: It is required to mention the segment of mesoderm that forms muscles.The formation of the three…
Q: Describe the Gastrulation in Caenorhabditis elegans.
A: The study of embryo development is known as embryology. This covers the transformation of a…
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: Which chordates exhibit internal fertilization? 2. Which chordates exhibit external fertilization?
A: External fertilization: it is a mode of reproduction where a male organism's sperm fertilizes a…
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: 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: 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: Describe internal fertilization process in sea urchin.
A: The process of internal fertilization occurs when a male and female gamete fuse inside the female…
Q: What is ovarian funnels in earthworm?
A: Earthworms are the members of the phylum Annelida of the kingdom Animalia. The body of 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: What are the molecules being secreted by the organizer in a regional fashion such that the first…
A: Development of embryo -- The development in developmental biology gave a milestone by the discovery…
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: Comparision between coleoptile and coleorhiza?
A: Plants are autotrophs. They are called so because they are not dependent on other organisms and can…
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: If radial cleavage occurs during development, the animal will be a deuterostome (True/False)?
A: Deuterostome in greek mean second mouth. It make a nephrozoa clade with protostomia clade. they are…
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: Internal Anatomy of Female Grasshopper Describe the function of the grasshopper (internal). What…
A: Internal function of Grasshopper: The internal cavity of grasshopper piled with…
Q: Briefly explain how and why the yolk distribution in mammalian eggs has changed from their…
A: According to Bartleby expert, when multiple questions are posted we are allowed to answer the first…
Q: What are the differences between unfertilized and fertilized egg?
A: As per our honor code, we are authorized to answer one question at a time, since you have not…
Q: What is the importance of sensory cephalization in animal survival?
A: Cephalization is the process in animals by which nervous and sensory tissues become concentrated in…
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 structures are derived from the ectoderm, mesoderm, and the endoderm?
A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…
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: How do the eggs ovulated into the abdominal cavity find their way out of the frog’s body?
A: To understand the path of the egg we need to understand that frogs lay eggs. This process usually…
Q: What is mesoderm? Name an invertebrate with mesoderm.
A: Introduction During embryonic development the three germ layers, ectoderm, endoderm and mesoderm…
Q: Define mammary gland with examples in class-mammalia?
A: Vertebrates: These are those organisms that consist of the notochord or vertebral column in the…
Q: n the early stages of amphibian development, what layer is involved in yolk digestion? What is the…
A: Embryonic development proceeds through these stages - cleavage, blastula, gastrulation, and…
Q: Distinguish two mechanisms by which flatworms supply yolk for their embryos. Which system is…
A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…
Q: What is fertilized egg known as?
A: Fertilization When male gamete fuses with female gamete, this process is known as fertilization.
Q: Compare gastrulation in the frog and the chick
A: The sperm and egg fuse to together to form a zygote, after eighth cell stage, the blastula is…
Q: Summerize various metabolic events involved in cleavage and blastulation in different animals.
A: The development of multi-cellular organisms begins from a single-celled zygote, which undergoes…
Q: Where does the embryo get oxygen and release carbon dioxide? Hint: Where do vascular systems come…
A: From the given question, the given embryo is assumed to be bird’s embryo.The early stage of the…
Q: What is the examples of animals reproducing sexually and ansexually?
A: Reproduction is considered a major biological process, where a matured organism produces new…
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,…
How is the mesoderm
(third germ layer) of
triploblastic animals formed?
Step by step
Solved in 2 steps
- What is mesoderm? Name an invertebrate with mesoderm.What are the differences between unfertilized and fertilized egg? Differentiate miolecithal, medialecithal and megalecithal. What organisms exhibit these features? What is the difference between isolecithal and telolecithal? How may these features affect the development of the organisms? What structures are derived from the ectoderm, mesoderm, and the endoderm?Are all of the organ systems fully developed in a free- swimming larva? Which organ systems are unlikely to be fully developed?
- What are the molecules being secreted by the organizer in a regional fashion such that the first cells involuting through the blastopore lip (the endomesoderm) induce head structures, whereas the next portion of involuting mesoderm (notochord) produces trunk and tail structures?How is the process of gastrulation accomplished in mammalian embryos?The notochord develops primarily from (a) ectoderm, (b) neural crest, (c) mesoderm, (d) endoderm.
- What are the four membranes associated with amniotic eggs? What is the function of each of these membranes?In Deuterostomes, nutrient molecules (monomers) are taken in to the space between the endoderm and the ectoderm because... A) The ectoderm makes protein for movement B) The endoderm cells release hydrolytic enzymes that act on polymers C) The endoderm releases enzymes that conduct dehydration synthesis of proteins D) mRNA polymerase causes hydrolysis of DNA E) All are correct Explain whyThe largest cycloneuralians are also the only ones with external fertilization. Which phylum is this? Explain the relationship between adult body size, mode of fertilization, and type of larval development in marine invertebrates.
- Distinguish two mechanisms by which flatworms supply yolk for their embryos. Which system is evolutionarily ancestral for flatworms and which one is derived?What is the importance of sensory cephalization in animal survival?Which of the following is true about Sea urchin blastula formation and fate map? a) ectoderm that develops into the larval skin and neurons, is regularly produced by the vegetal half of the embryo. b) an1 layer generates cells that can enter either the ectodermal or endodermal organs of the larva. c) veg2 layer forms the endoderm, coelom (internal mesodermal body wall), and the non- skeletogenic mesenchyme. d) small micromeres differentiate into the PGCS e) large micromeres differentiate into the secondary mesenchyme cells