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 : 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 : 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 : Are the extra embryonic membranes the same in all vertebrates ?
Last Answer : The presence of each extra embryonic membrane varies according to the vertebrate class. In fishes and amphibians, only the yolk sac is present. In reptiles and aves besides the yolk sac, there ... and the allantois. In placental mammals besides all these membranes, the placenta is present too.
Description : What are the extra embryonic membranes present in vertebrates ?
Last Answer : The extra embryonic membranes that may be present in vertebrates are the yolk sac, the amnion, the chorion, the allantois and the placenta.
Description : What are extra embryonic membranes ?
Last Answer : Extra embryonic membranes are membranous structures that appear paralleling the embryo and play important roles in the embryonic development. They form from the embryo but do not become part of the individual organism after its birth.
Description : The blastomeres in the blastocyst are arranged into an outer layer `____A____` and inner group of cells attached to trophoblast called the `___B____`.
Last Answer : The blastomeres in the blastocyst are arranged into an outer layer `____A____` and inner group of ... are trophoblast D. Both are inner cell masses
Description : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?
Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk one B. Amnion C. Chorion D. Allantois.
Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk sac B. Amnion C. Chorion D. Allantois
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
Description : Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo ?
Last Answer : Is this function present in placental mammalian embryos? The allantois is the extra embryonic membrane whose function is to store excretes of the embryo. In placental mammals, the allantois is present ... wastes are collected by the mother's body through the placenta. Image Diversity: allantois
Description : Mention the function of trophoblast in human embryo. -Biology
Last Answer : Trophoblast is the outer layer of blastocyst which helps in attachment of blastocyst to the endometrium of the uterus.
Description : Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell ... . Name a cellular component whose membrane is not part of the endomembrane system.
Last Answer : Mitochondria; also chloroplasts
Description : In the mammalian body, this element plays many important roles. Try to identify this element with the fewest number of clues. This element is required to insure the integrity and permeability of ... involved in blood coagulation and is the most important element of bone salt. Name this element.
Last Answer : ANSWER: Calcium
Description : Mammalian follicle was first described by
Last Answer : Mammalian follicle was first described by A. Leewenhock B. R.D. Graaf C. Spallazani D. Von Baer
Description : The second maturation division of the mammalian ovum occurs (a) shortly after ovulation before the ovum makes entry into the fallopian tube (b) until after the ovum has been penetrated by a sperm ... with that of the ovum (d) in the Graafian follicle following the first maturation division.
Last Answer : (b) until after the ovum has been penetrated by a sperm
Description : If mammalian ovum fails to get fertilised, which one of the following is unlikely? (a) Corpus luteum will disintegrate. (b) Progesterone secretion rapidly declines. (c) Estrogen secretion further increases. (d) Primary follicle starts developing.
Last Answer : (c) Estrogen secretion further increases.
Description : Is the mammalian embryonic development direct or indirect?
Last Answer : In mammals the embryonic development is direct, without larval stage.
Description : What Human embryonic membranes?
Last Answer : Feel Free to Answer
Description : Match column I with column II and select the correct option using the given codes. Column I Column II A. Mons pubis (i) Embryo formation B. Antrum (ii) Sperm C. Trophectoderm (iii)Female external genitalia D. Nebenkern (iv) Graafian ... (i), C-(iv), D-(ii) (d) A-(i), B-(iv), C-(iii), D-(ii
Last Answer : (b) A-(iii), B-(iv), C-(i), D-(ii)
Description : In human female, the blastocyst (a) forms placenta even before implantation (b) gets implanted into uterus 3 days after ovulation (c) gets nutrition from uterine endometrial secretion only after implantation (d) gets implanted in endometrium by the trophoblast cells.
Last Answer : (d) gets implanted in endometrium by the trophoblast cells.
Description : In mammalian embryo the pulmonary aorta communicates with carotico-systemic aorta by a narrow ductus arteriosus, in the adult this connection closes l
Last Answer : In mammalian embryo the pulmonary aorta communicates with carotico-systemic aorta by a narrow ductus ... C. Ligamentum arteriosus D. None of these
Description : Excretory products of mammalian embryo are eliminated out by - (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter
Last Answer : (1) Placenta Explanation: The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood ... are also found in some snakes and lizards with yawing levels of development up to mammalian levels.
Description : DIFFERENTIATE BETWEEN MORULA AND BLASTULA STAGES OF MAMMALIAN EMBRYO.
Last Answer : ANS. MORULA: (i) 8 TO 16 CELLED STAGE EMBRYO (ii) SOLID WITHOUT ANY CAVITY BLASTULA: (i) 32 CELLED STAGE EMBRYO. (ii) HOLLOW WITH A CAVITY CALLED BLASTOCOEL
Description : AT WHAT STAGE IS THE MAMMALIAN EMBRYO IMPLANTED IN THE UTERUS ?
Last Answer : ANS. AT THE BLASTOCYST STAGE.
Description : Excretory products of mammalian embryo are eliminated out by (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter
Last Answer : Placenta
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 : Which is the only dental tissue that loses its formative cells as it matures: A. Enamel B. Dentine C. Pulp D. Cementum
Last Answer : A. Enamel
Description : All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase.
Last Answer : (c) succinate dehydrogenase
Description : How are embryonic stem cells different from other types of stem cell?
Last Answer : Need Answer
Description : The placenta in humans is derived from the: a) embryo only b) uterus only c) endometrium and embryo d) none of the above
Last Answer : ANSWER: C -- ENDOMETRIUM AND EMBRYO
Description : Which one of the following is initiated by secretions of trophoblast?
Last Answer : Which one of the following is initiated by secretions of trophoblast? A. Blastulation B. Implanatation C. Cleavage D. Gastrualtion
Description : Restriction endonucleases (a) are present in mammalian cells for degradation of DNA when the cell dies (b) are used in genetic engineering for ligating two DNA molecules (c) are used for in vitro DNA synthesis (d) are synthesized by bacteria as part of their defense mechanism.
Last Answer : (d) are synthesized by bacteria as part of their defense mechanism.
Description : A striking feature of living cells is a marked difference between the composition of the cytosol and the extracellular milieu. Which of the following statement(s) concerning the mechanisms of maintenance ... d. The selectivity of cell membranes relates only to ions and not organic compounds
Last Answer : Answer: a The survival of the cell requires that cytosolic composition be maintained within narrow limits, despite the constant influx of nutrients and the simultaneous outflow of waste. A ... be altered drastically as a result of regulatory or signaling processes that occur within the cell
Description : Which of the following statement(s) is/are true concerning water movement across cell membranes? a. Water moves only actively through cell membrane transport proteins b. For most cells of ... cells such as the glomerulus of the kidney actively transport water to maintain hydrostatic pressure
Last Answer : Answer: b, c The energetics of water transport across cell membranes is simplified by the fact that water moves only passively due to gradients of hydrostatic pressure or water ... water is distributed at equilibrium. Water distribution is determined entirely by solute to solute distribution
Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.
Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.
Description : Proteins that are secreted by cells are generally a. not synthesized on membrane-bound ribosomes b. initially synthesized with a signal peptide or leader sequence at their C terminal c. found in ... endocytosis e. secreted in a form that is larger than the form present in the endoplasmic reticulum
Last Answer : found in vesicles and secretory granules
Description : Where does protein synthesis take place in all cells? a. mitochondria b. cell membranes c. ribosomes d. Golgi apparatus
Last Answer : c. ribosomes
Description : The ovule in which embryo sac become horse shoe shaped in: (a) Amphitropous (b) Camphylotropous (c) Orthotropous (d) Anatropous Ans. (a) .................................. ... TEST SAMPLE QUESTIONS 1. Caruncle develops-from: (a) Outer integument (b) Ctyledon (c) Funiculus (d) Inner integuments
Last Answer : Ans. ((a))
Description : Extra structure that provides nutriiton to embryo is
Last Answer : Extra structure that provides nutriiton to embryo is A. Umbilicus B. Chorion C. Placenta D. Amnion.
Last Answer : Extra structure that provides nutriiton to embryo is A. Umbilicus B. Amnion C. Chorion D. Placenta.
Description : Callus is a. Tissue that forms embryo b. An insoluble carbohydrate c. Tissue that grows to form embryoid d. Unorganized actively dividing mass of cells maintained in cultured
Last Answer : d. Unorganized actively dividing mass of cells maintained in cultured
Description : Drilling, milling and threading are examples of which kind of processes? a.Additive manufacturing b.Subtractive manufacturing c.Formative manufacturing d.None of the above
Last Answer : b.Subtractive manufacturing
Description : Which of the following process is not formative process? a.Bending b.Plastic injection molding c.Selective Laser Sintering d.Forging
Last Answer : c.Selective Laser Sintering
Description : __________ is one where mechanical forces or restricting forms are applied on a material so asto form it into the desired shape a.Subtractive process b.Additive process c.Formative process d.All of above
Last Answer : c.Formative process
Description : In the ___________ process, one starts with a single block of solid material larger than the finalsize of the desired object and material is removed until the desired shape is reached. a.Subtractive process b.Additive process c.Formative process d.All of above
Last Answer : a.Subtractive process
Description : Assertion (A): Formative evaluation tends to accelerate the pace of learning. Reason (R): As against summative evaluation, formative evaluation is highly reliable. Choose the correct Answer from the following code (A) Both (A) and ... ) is true, but (R) is false. (D) (A) is false, but (R) is true
Last Answer : Answer: C
Description : The purpose of formative evaluation is to (A) grade students’ learning outcomes. (B) accelerate students’ learning performance. (C) check students’ performance graph. (D) provide feedback to teacher effectiveness.
Last Answer : (B) accelerate students’ learning performance
Description : Identify the category of evaluation that assesses the learning progress to provide continuous feedback to the students during instruction. (A) Placement (B) Diagnostic (C) Formative (D) Summative
Last Answer : (C) Formative