Three germ layers are formed during which stage of embryonic development :-

Three germ layers are formed during which stage of embryonic development :-
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Three germ layers are formed during which stage of embryonic development :- A. Morula B. Blastula C. Gastrula D. In any two stages
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How are animals classified according to the germ layers present in their embryonic development ?

Description : How are animals classified according to the germ layers present in their embryonic development ?

Last Answer : Cnidarians are diploblastic, i.e., they present only endoderm and ectoderm. With the exception of poriferans, all remaining animals are triploblastic. Poriferans do not present differentiated tissue ... not classify regarding germ layers (although sometimes they are mentioned as diploblastic).

How are animals classified according to the germ layers present in their embryonic development ?

Description : How are animals classified according to the germ layers present in their embryonic development ?

Last Answer : Cnidarians are diploblastic, i.e., they present only endoderm and ectoderm. With the exception of poriferans, all remaining animals are triploblastic. Poriferans do not present differentiated tissue ... not classify regarding germ layers (although sometimes they are mentioned as diploblastic).

Sponge identity card. How are sponges characterized according to example of representing beings, basic morphology, type of symmetry, embryonic (germ) layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Sponge identity card. How are sponges characterized according to example of representing beings, basic morphology, type of symmetry, embryonic (germ) layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Example of representing beings: sponges. Basic morphology: tubular or globular body with spongocoel, sessile; choanocytes, pinacocytes and amoebocytes. Type of symmetry: not established. Germ layers ... Types of reproduction: asexual and sexual with larval stage. Cnidarians - Questions and Answers

In which stage of development the embryonic cells form the germinal layers by the movement

Description : In which stage of development the embryonic cells form the germinal layers by the movement

Last Answer : In which stage of development the embryonic cells form the germinal layers by the movement A. Morula B. Blastula C. Gastrula D. Zygote

Which germ layer developes first during embryonic development?

Description : Which germ layer developes first during embryonic development?

Last Answer : Which germ layer developes first during embryonic development? A. Ectoderm B. Mesoderm C. Endoderm D. Both 1 and 3

What is the cell division during the first stage of the embryonic development called ?

Description : What is the cell division during the first stage of the embryonic development called ?

Last Answer : How is this stage characterized? The cell division in the first stage of the embryonic developments is called cleavage, or segmentation. In this stage, mitosis occurs from the zygote forming the new embryo.

What is the cell division during the first stage of the embryonic development called ?

Description : What is the cell division during the first stage of the embryonic development called ?

Last Answer : How is this stage characterized? The cell division in the first stage of the embryonic developments is called cleavage, or segmentation. In this stage, mitosis occurs from the zygote forming the new embryo.

What are the three types of germ layers that form tissues and organs in animals ?

Description : What are the three types of germ layers that form tissues and organs in animals ?

Last Answer : The three germ layers are the ectoderm, the mesoderm, and the endoderm. 39. How is the mesoderm (third germ layer) of triploblastic animals formed? The mesoderm appears from differentiation of endodermal cells that cover the dorsal region of the archenteron.

What are the three types of germ layers that form tissues and organs in animals ?

Description : What are the three types of germ layers that form tissues and organs in animals ?

Last Answer : The three germ layers are the ectoderm, the mesoderm, and the endoderm. Image Diversity: germ layers

(i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Description : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.

Study the given figure below and answer the question that follow important-questions-for-class-12-biology-cbse-fertilisation-pregnancy-and-embryonic-development-t-33-3 (i)Name the stage of human embryo the figure represents. (ii)Identify Ain the figure and mention its function. (iii)Mention the fate of the inner cell mass after implantation in the uterus. (iv)Where are the stem cells located in this embryo? -Biology

Description : Study the given figure below and answer the question that follow important-questions-for-class-12-biology-cbse-fertilisation-pregnancy-and-embryonic-development-t-33-3 (i)Name the stage of human embryo the ... implantation in the uterus. (iv)Where are the stem cells located in this embryo? -Biology

Last Answer : (i)The stage is blastocyst. (ii) A—Trophoblast. It helps in attachment to endometrium during implantation and provides nourishment to developing embryo. (iii) Inner cell mass acts as precursor to embryo ... into ectoderm and endoderm. (iv) Stem cells are located in inner cell mass of embryo.

What are the cells produced in the first stage of the embryonic development called ?

Description : What are the cells produced in the first stage of the embryonic development called ?

Last Answer : The cells that resulted from the cleavage (the first stage of the embryonic development) are called blastomeres. In this stage the embryo is called morula (similar to a “morus”, mulberry).

After the blastula stage what is the following stage of the embryonic development ?

Description : After the blastula stage what is the following stage of the embryonic development ?

Last Answer : How is the passage from blastula to the next stage called? The blastula turns into gastrula in a process known as gastrulation.

After the blastula stage what is the following stage of the embryonic development ?

Description : After the blastula stage what is the following stage of the embryonic development ?

Last Answer : How is the passage from blastula to the next stage called? The blastula turns into gastrula in a process known as gastrulation. Image Diversity: gastrula

What are the cells produced in the first stage of the embryonic development called ?

Description : What are the cells produced in the first stage of the embryonic development called ?

Last Answer : The cells that resulted from the cleavage (the first stage of the embryonic development) are called blastomeres. In this stage the embryo is called morula (similar to a “morus”, mulberry). Image Diversity: morula

How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development?

Description : How are the main classes of arthropods classified according to the presence of larval stage in their embryonic development?

Last Answer : In crustaceans there are species with direct and others with indirect development. In insects there are species without larval stage (ametabolic insects), others undergoing indirect ... while holometabolic insects undergo complete metamorphosis. Phylum Arthropoda - Image Diversity: metamorphosis

What are ectoderm and endoderm germ layers?

Description : What are ectoderm and endoderm germ layers?

Last Answer : Need answer

Chordate identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Chordate identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: protochordates (ascidians, amphioxus), vertebrates. Basic morphology: branchial clefts, notochord, neural tube. Type of symmetry: bilateral. Germ layers and coelom: ... in vertebrates. Types of reproduction: sexual, with or without larval stage. Fish Review

Echinoderm identity card. How are echinoderms characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Echinoderm identity card. How are echinoderms characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: sea cucumber, sea urchin, starfishes. Basic morphology: calcareous endoskeleton with spines, ambulacral system. Type of symmetry: secondary radial. Germ layers and ... cephalization. Types of reproduction: sexual, with larval stage. Phylum Chordata - Study Here

Mollusc identity card. How are molluscs characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Mollusc identity card. How are molluscs characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: snails, sea slugs, octopuses, squids, mussels, oysters. Basic morphology: soft body, with or without calcareous shell. Type of symmetry: bilateral. ... system: ganglial, advanced cephalization in cephalopods. Types of reproduction: sexual. Phylum Echinodermata Review

Arthropod identity card. How are arthropods characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Arthropod identity card. How are arthropods characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: cockroaches, flies, crabs, lobsters, shrimps, spiders, scorpions, mites. Basic morphology: segmented body (metameric), articulated limbs, chitinous exoskeleton, ... crustaceans, metamorphosis in some insects, no larval stage in arachnids. Phylum Mollusca Review

Concerning germ layers and the presence of coelom how are arthropods characterized?

Description : Concerning germ layers and the presence of coelom how are arthropods characterized?

Last Answer : Arthropods are triploblastic (they have three germ layers) and coelomate beings.

Annelid Identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Annelid Identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: earthworms, leeches, lugworms. Basic morphology: cylindrical body, segmented (metameric). Type of symmetry: bilateral. Germ layers and coelom: triploblastics, ... ). Types of reproduction: sexual, with dioecious and monoecious beings. Phylum Arthopoda Review

Nematode identity card. How are nematodes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Nematode identity card. How are nematodes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: ascaris, hookworms, filaria, pinworms. Basic morphology: cylindric (round) body, not segmented. Type of symmetry: bilateral. Germ layers and coelom: ... ganglial chord, primitive cephalization. Types of reproduction: sexual. Phylum Annelida - Q&A Review

Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: planarias, schistosomes, taenias. Basic morphology: flat worm. Type of symmetry: bilateral. Germ layers and coelom: triploblastics, acoelomates. Digestive system: ... , beginning of cephalization. Types of reproduction: asexual and sexual. Phylum Nematoda Review

How many germ layers originate the body of platyhelminthes? In relation to this characteristic how are these animals classified?

Description : How many germ layers originate the body of platyhelminthes? In relation to this characteristic how are these animals classified?

Last Answer : Platyhelminthes are the first triploblastic animals (remember that cnidarians are diploblastic), i.e., they present three germ layers: ectoderm, mesoderm and endoderm.

Cnidarian identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Cnidarian identity card. How are they characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: jellyfish, corals, sea anemones, hydra. Basic morphology: polyp or medusa. Type of symmetry: radial. Germ layers and coelom: diploblastics, acoelomate. Digestive ... of reproduction: asexual and sexual with larval stage and metagenesis. Flatworms - Study Them Here

Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

Description : Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

Last Answer : These beings present ectoderm and endoderm, two germ layers. Animals with only two germ layers are called diploblastic animals. The ectoderm gives birth to the epidermis and the endoderm originates the covering of the digestive cavity. Image Diversity: germ layers

Which animal's body is made up of two embryonic cell layers ?

Description : Which animal's body is made up of two embryonic cell layers ?

Last Answer : Answer : The body of a hydra is made up of two embryonic cell layers.

With respect to lens development: a. the lens first appears at 27 days of gestation b. it is formed from neural crest cells c. the lens first appears as a vesicles with a single layer of epithelial cells d. Y suture is absent in the embryonic nucleus e. the adult lens is more spherical than the foetal

Description : With respect to lens development: a. the lens first appears at 27 days of gestation b. it is formed from neural crest cells c. the lens first appears as a vesicles with a single layer of ... d. Y suture is absent in the embryonic nucleus e. the adult lens is more spherical than the foetal

Last Answer : the lens first appears at 27 days of gestation

Name the embryonic stage that gets implanted in the uterine wall of a human female. -Biology

Description : Name the embryonic stage that gets implanted in the uterine wall of a human female. -Biology

Last Answer : Blastocyst gets implanted in the uterine wall.

in which of the following the notochord is present in embryonic stage

Description : in which of the following the notochord is present in embryonic stage

Last Answer : in which of the following the notochord is present in embryonic stage A. All chordates B. Some chordates C. Vertebrates D. Non- chordates

Movement of blastomers usually seen in which embryonic stage :-

Description : Movement of blastomers usually seen in which embryonic stage :-

Last Answer : Movement of blastomers usually seen in which embryonic stage :- A. Morula B. Blastula C. Gastrula D. In all embryonic stages

Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is mainly found in enbryonic stage .

Description : Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is mainly found in enbryonic stage .

Last Answer : Assertion : Mucoid connective tissue is called as embryonic tissue. Reason : Mucoid connective tissue is ... D. If both Assertion & Reason are false.

The subphylum in which notochord is restricted only to the embryonic stage is

Description : The subphylum in which notochord is restricted only to the embryonic stage is

Last Answer : vertebrata.

In which of the following, notochord is present in embryonic stage? (a) All chordates (b) Some chordates (c) Vertebrates (d) Non chordates

Description : In which of the following, notochord is present in embryonic stage? (a) All chordates (b) Some chordates (c) Vertebrates (d) Non chordates

Last Answer : (a) All chordates

pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Description : pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Last Answer : c) Embryological evidence

During embryonic development , endoskeleton and muscle develop from which germinal layer :

Description : During embryonic development , endoskeleton and muscle develop from which germinal layer :

Last Answer : During embryonic development , endoskeleton and muscle develop from which germinal layer : A. Ectoderm B. Endoderm C. Mesoderm D. Blastopore

During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called (a) organiser phenomena (b) axis formation (c) anamorphosis (d) pattern formation.

Description : During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called (a) organiser phenomena (b) axis formation (c) anamorphosis (d) pattern formation.

Last Answer : (a) organiser phenomena

Which of the following features is not present in Periplaneta americana? (a) Exoskeleton composed of N-acetylglucosamine (b) Metamerically segmented body (c) Schizocoelom as body cavity (d) Indeterminate and radial cleavage during embryonic development

Description : Which of the following features is not present in Periplaneta americana? (a) Exoskeleton composed of N-acetylglucosamine (b) Metamerically segmented body (c) Schizocoelom as body cavity (d) Indeterminate and radial cleavage during embryonic development

Last Answer : (a) Exoskeleton composed of N-acetylglucosamine

Metagenesis refers to (a) occurrence of a drastic change in form during post-embryonic development (b) presence of a segmented body and parthe- nogenetic mode of reproduction (c) presence of different morphic forms (d) alternation of generation between asexual and sexual phases of an organism.

Description : Metagenesis refers to (a) occurrence of a drastic change in form during post-embryonic development (b) presence of a segmented body and parthe- nogenetic mode of reproduction (c) presence of different morphic forms (d) alternation of generation between asexual and sexual phases of an organism.

Last Answer : (d) alternation of generation between asexual and sexual phases of an organism.

Embryonic connective tissue is formed from

Description : Embryonic connective tissue is formed from

Last Answer : Embryonic connective tissue is formed from A. Ectoderm B. Endoderm C. Mesenchyma D. Mesogloes.

$ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body.

Description : $ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body.

Last Answer : $ The first formed embryonic cavity is called blastocoel. ! Annelids have a segmented body. A. If both As ... is wrong D. If both As and R are wrong.

In human embryo the extra embryonic membrane are formed by :

Description : In human embryo the extra embryonic membrane are formed by :

Last Answer : In human embryo the extra embryonic membrane are formed by : A. Inner cell wall B. Trophoblast C. Formative cells D. Foillcless cells

Which of the following embryonic layer formed gametes :

Description : Which of the following embryonic layer formed gametes :

Last Answer : Which of the following embryonic layer formed gametes : A. Ectoderm B. Endoderm C. Mesoderm D. Mesoderm

Correct sequence of human embryonic development is

Description : Correct sequence of human embryonic development is

Last Answer : Correct sequence of human embryonic development is A. Gastrocoel-Blastocoel-Neural Crest - ... . Blastocoel-Gastrucoel-Neural crest -Notochord.

What are the four initial stages of the embryonic development ?

Description : What are the four initial stages of the embryonic development ?

Last Answer : The four initial stages of the embryonic development are the morula stage, the blastula stage, the gastrula stage, and the neurula stage.

What is the chorioallantois membrane present in the embryonic development of reptiles and birds ?

Description : What is the chorioallantois membrane present in the embryonic development of reptiles and birds ?

Last Answer : How does this membrane participate in the energetic metabolism of the embryo? The chorioallantois membrane is formed by juxtaposition of some regions of the chorion and the allantois. Since it is ... of gases between the embryo and the exterior thus making aerobic cellular respiration possible.

What are the four initial stages of the embryonic development ?

Description : What are the four initial stages of the embryonic development ?

Last Answer : The four initial stages of the embryonic development are the morula stage, the blastula stage, the gastrula stage, and the neurula stage.

Is the mammalian embryonic development direct or indirect?

Description : Is the mammalian embryonic development direct or indirect?

Last Answer : In mammals the embryonic development is direct, without larval stage.