Description : The following are germ layer origin of tissues a. ectoderm b. mesoderm c. endoderm d. All
Last Answer : All
Description : Eye lens is formed from (a) ectoderm (b) mesoderm (c) endoderm (d) ectoderm and mesoderm.
Last Answer : (a) ectoderm
Description : The amnion of mammalian embryo is derived from (a) ectoderm and mesoderm (b) endoderm and mesoderm (c) mesoderm and trophoblast (d) ectoderm and endoderm
Last Answer : (a) ectoderm and mesoderm
Description : Coelom is found between (a) body wall and ectoderm (b) ectoderm and endoderm (c) mesoderm and body wall (endoderm) (d) mesoderm and ectoderm.
Last Answer : (c) mesoderm and body wall (endoderm)
Description : The amnion of mammalian embryo is derived from (1) ectoderm and mesoderm (2) endoderm and mesoderm (3) mesoderm and trophoblast (4) ectoderm and endoderm
Last Answer : (1) ectoderm and mesoderm
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
Description : Gonads/testes develop from embryonic
Last Answer : Gonads/testes develop from embryonic A. Ectoderm B. Endoderm C. Mesoderm D. Both mesoderm and endoderm.
Description : What are ectoderm and endoderm germ layers?
Last Answer : Need answer
Description : Assertion : Originwise hair are epithelial tissue which are of ectodermal origin. Reason : Epithelial tissue can be formed from mesoderm and endoderm
Last Answer : Assertion : Originwise hair are epithelial tissue which are of ectodermal origin. Reason : Epithelial ... . If both Assertion & Reason are false.
Description : Assertion : Adrenal gland have dual origin. Reason : The aderenal cortex develops from endoderm while adrenal medulla develops from mesoderm.
Last Answer : Assertion : Adrenal gland have dual origin. Reason : The aderenal cortex develops from endoderm while ... D. If both Assertion and Reason are false.
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
Description : 7. Removal of gonads cannot be considered as a contraceptive option. Why? -Science
Last Answer : Ans: Removal of gonads or its parts is a surgical method, of sterilization. Vasectomy and tubectomy are carried out in males and females respectively. It will lead to infertility & both male ... very effective but their irreversibility is very poor, so they are not good options for contraception.
Description : What are the hormones secreted by Gonads (Testes, Ovaries)? -Biology
Last Answer : answer:
Description : Assertion : Simple cuboidal epithelium is also called as germinal epithelium Reason : Cuboidal cells of gonads forms gametes
Last Answer : Assertion : Simple cuboidal epithelium is also called as germinal epithelium Reason : Cuboidal cells of ... . If both Assertion & Reason are false.
Description : Assertion : Simple columner epithelium is also called as Germinal epithelium. Reason : Columnar cells of gonads forms gametes .
Last Answer : Assertion : Simple columner epithelium is also called as Germinal epithelium. Reason : Columnar cells of ... D. If both Assertion & Reason are false.
Description : Vitamin E protects enzymes from destruction in (A) Muscles (B) Nerves (C) Gonads (D) All of these
Last Answer : Answer : D
Description : Name the hormones produced by gonads.
Last Answer : a) Testis secretes the male sex hormone androgen. b) Ovaries secretes the female sex hormone estrogen
Description : What are gonads?
Last Answer : Gonads are the sex glands. Gonads produce sex hormones after the attainment of puberty.
Description : Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH ... produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.
Last Answer : B) When the blood becomes dilute, ADH is no longer released from the hypothalamus
Description : Which is the characteristic cell in ectoderm ?
Last Answer : Answer : Nidoblast is a characteristic cell in ectoderm.
Description : Ectoderm give rise to
Last Answer : Ectoderm give rise to A. Cornea, hearth, bronchi, dentine B. Adrenal cortex, tongue, liver, retina ... Enamel of teeth, nails, adrenal medulla, hair.
Description : Ectoderm forms
Last Answer : Ectoderm forms A. Bones and muscles B. Lining of gut and respiratory organs C. Enamel of teeth and cornea of eye D. Gonads and blood vessels.
Description : Which are derivatives of endoderm?
Last Answer : Which are derivatives of endoderm? A. Muscles and blood B. Alimentary canal and respiratory organs ... reproduction organs D. Skin and nerve cord.
Description : The following structure arise from surface ectoderm: a. conjunctival epithelium b. lens c. lacrimal gland d. all above
Last Answer : all above
Description : Endoderm forms a. digestive tube b. kidney c. nails muscles
Last Answer : digestive tube
Description : Ectoderm forms a. Epidermis b. Blood c. larynx d. All
Last Answer : Epidermis
Description : The blastula develops into the: a) gastrula b) morula c) endoderm d) zygote
Last Answer : ANSWER: A -- GASTRULA
Description : Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called
Last Answer : Body cavity is the cavity present between body wall and gut wall. In some animals the ... Acoelomate B. Pseudocoelomate C. Coelomate D. Haemocoelomate
Description : Which of the following are triploblastic, acoelomate with blind sac type of body plan, and parechyma cells originating from mesoderm fill up the cavit
Last Answer : Which of the following are triploblastic, acoelomate with blind sac type of body plan, and ... B. Plathyhelminthes C. Annelids D. Arthropoda
Description : Mesoderm is formed through invagination of
Last Answer : Mesoderm is formed through invagination of A. Ectoderm B. Endoderm C. Inner mass of cells D. Primitive streak.
Description : How is the mesoderm ?
Last Answer : third germ layer) of triploblastic animals formed? The mesoderm appears from differentiation of endodermal cells that cover the dorsal region of the archenteron.
Description : Mesoderm form a. Muscles b. Bone --- c. gonad d. All
Description : The outer most layer of skin is called the: a) endodermis b) mesoderm c) epidermis d) dermis
Last Answer : ANSWER: C -- EPIDERMIS
Description : Have we seen any benefit from embryonic stem cell research?
Last Answer : Here is the answer regarding legalities. http://stemcells.nih.gov/policy/Pages/Default.aspx It is well past my bedtime, so I’ll be back later for further discussion.
Description : If you are against embryonic cell research for moral reasons, but we discover the cure for a disease you or your family member comes down with, will you use the treatment?
Last Answer : I think people opposed to embryonic cell research are ignorant. I think that people who say “yes” to your question but continue to oppose the research in general are selfish, hypocritical, and clueless.
Description : What's so wrong with embryonic stem cell research?
Last Answer : Its evil.
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.
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.
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.
Description : What is the upper part of the embryonic root called ?
Last Answer : The upper part of the embryonic root is called the hypocotyl.
Description : Does Vertibrata become embryonic notochord ?
Last Answer : Answer : In the vertebrate phase, the embryonic notochord turns into a nerve.
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.
Description : What is embryonic layer ?
Last Answer : The embryonic layer is the cellular layer from which the tissues or organs are formed later.
Description : What is embryonic level ?
Last Answer : The layers in the gastrointestinal tract of the fetus are called embryonic layers.
Description : How are embryonic stem cells different from other types of stem cell?
Last Answer : Need Answer
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
Description : Animlas which are triploblatic with tube- within - tube type of body plan and embryonic blastopore forms anus (deutterostomia ) are
Last Answer : Animlas which are triploblatic with tube- within - tube type of body plan and embryonic ... Annelids B. Molluscs C. Platyhelminthes D. Echinoderms
Description : Connective tissues are derived from embryonic
Last Answer : Connective tissues are derived from embryonic A. Ectoderm B. Endo-mesoderm C. Endoderm D. Mesoderm.
Description : Identify the wrong statement with respect to embryonic stem cells
Last Answer : Identify the wrong statement with respect to embryonic stem cells A. They are pluripotent B. They are ... can give rise to the three germinal layers.
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.