Which germ layer developes first during embryonic development?

Which germ layer developes first during embryonic development?
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Which germ layer developes first during embryonic development? A. Ectoderm B. Mesoderm C. Endoderm D. Both 1 and 3
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Three germ layers are formed during which stage of embryonic development :-

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

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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 ?

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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?

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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

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

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$ The zyhote developes into a multicellular organisms. ! Each cell is totipotent.

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In a vertebrate which germ layer forms the skeletal muscles :

Description : In a vertebrate which germ layer forms the skeletal muscles :

Last Answer : In a vertebrate which germ layer forms the skeletal muscles : A. Ectoderm B. Endoderm C. Mesoderm D. Both 1 and 2

What is the germ layer from which the coeloms originate ?

Description : What is the germ layer from which the coeloms originate ?

Last Answer : The coeloms are originated from mesoderm.

What is the germ layer from which the coeloms originate ?

Description : What is the germ layer from which the coeloms originate ?

Last Answer : The coeloms are originated from mesoderm.

The following are germ layer origin of tissues a. ectoderm b. mesoderm c. endoderm d. All

Description : The following are germ layer origin of tissues a. ectoderm b. mesoderm c. endoderm d. All

Last Answer : All

The nervous system develops from which germ layer? a) ectoderm b) mesoderm c) endoderm d) none of the above

Description : The nervous system develops from which germ layer? a) ectoderm b) mesoderm c) endoderm d) none of the above 

Last Answer : ANSWER: A -- ECTODERM

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 is embryonic layer ?

Description : What is embryonic layer ?

Last Answer : The embryonic layer is the cellular layer from which the tissues or organs are formed later.

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

Skeletal tissue originated from which embryonic germinel layer :-

Description : Skeletal tissue originated from which embryonic germinel layer :-

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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.

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).

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

(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

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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.

Correct sequence of human embryonic development is

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

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

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.

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.

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.

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 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.

Is the embryonic development in birds direct or indirect?

Description : Is the embryonic development in birds direct or indirect?

Last Answer : The embryonic development is direct, there is no larval stage.

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

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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

Is the embryonic development in earthworms direct or indirect?

Description : Is the embryonic development in earthworms direct or indirect?

Last Answer : In earthworms there is no larval stage, so the embryonic development is direct.

The process of series of changes from larva to adult after embryonic development is called (a) regeneration (b) growth (c) metamorphosis (d) ageing.

Description : The process of series of changes from larva to adult after embryonic development is called (a) regeneration (b) growth (c) metamorphosis (d) ageing.

Last Answer : (c) human males only

Assertion : Most of bones of body are cartilagenous. Reason : Connective tissue originated first during embryonic develoment.

Description : Assertion : Most of bones of body are cartilagenous. Reason : Connective tissue originated first during embryonic develoment.

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During embryonic period blood is form in :-

Description : During embryonic period blood is form in :-

Last Answer : During embryonic period blood is form in :- A. Thymus gland B. spleen C. Liver D. All of the above

Which of the following statements are true for the Phylum Chordata? (A) In Urochordata, notochord extends from head to tail and it is present throughout their life. (B) In Vertebrata, notochord is present during the embryonic period only. (C) Central nervous system is dorsal and hollow. (D) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata. (a) (D) and (C) (b) (C) and (A) (c) (A) and (B) (d) (B) and (C)

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Last Answer : (d) (B) and (C)

Organogenesis occurs during ______________stage. a) Pre-embryonic. b) Embryonic. c) Pre-Fetal. d) Fetal.

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Last Answer : b) Embryonic. 

In humans, at the end of the first meiotic division, the male germ cells differentiate into the

Description : In humans, at the end of the first meiotic division, the male germ cells differentiate into the

Last Answer : In humans, at the end of the first meiotic division, the male germ cells ... Spermatozonia C. Primary spermatocytes D. Secondary spermatocytes

n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.

Description : n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.

Last Answer : (d) secondary spermatocytes.

What is the difference between a somatic cell and a germ cell?

Description : What is the difference between a somatic cell and a germ cell?

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Do you agree with this acquaintance's thoughts on the "germ" situation?

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Is wheat germ still in favor as a health food?

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Is it a good idea to put Wheat Germ on a hamburger in order to increase personal fiber intake?

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How do I clean my new second hand fridge to ensure it is germ free?

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Last Answer : Use a spray-cleaner that contains bleach. I returned from winter break to find my fridge covered in mold, and that’s what I used. Worked like a charm, the fridge was uber clean and spotless. Kinda smelled like bleach for a couple days, but there’s a comfort in that :D

How well does Germ X work?

Description : How well does Germ X work?

Last Answer : I’ve never noticed sticky hands from Germ-X. I use “original”, perhaps you are using some with aloe. I know that aloe can leave a sticky residue behind on hands.

What is germ line gene therapy? -Biology

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Last Answer : answer:

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Description : What is germ line gene therapy? -Biology

Last Answer : answer: