Description : (i) Mention the event that induces the completion of the meiotic division of the secondary oocyte. (ii) Trace the journey of the ovum from the ovary, its fertilisation and further development until the implantation of the embryo. -Biology
Last Answer : (i)Secondary oocyte completes meiosis-ll only when a sperm enters its cytoplasm. It forms a larger cell, the ootid and a small cell, the second polar body. (ii)The secondary oocyte is ... and inner cell mass.The trophoblast attacheds to endometrium (implantation) and blastocyst gets embedded in it.
Description : Oocyte is liberated from ovary under the influence of LH, after completing
Last Answer : Oocyte is liberated from ovary under the influence of LH, after completing A. Meiosis and before ... . Meiosis II after release of first polar body
Description : Meiotic division of the secondary oocyte is completed (a) prior to ovulation (b) at the time of copulation (c) after zygote formation (d) at the time of fusion of a sperm with an ovum.
Last Answer : (d) at the time of fusion of a sperm with an ovum.
Description : The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic (a) B- Corpus luteum - Secretes progesterone (b) A- ... Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division
Last Answer : (a) B- Corpus luteum - Secretes progesterone
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum
Last Answer : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , ... D. If both Assertion & Reason are False.
Description : Assertion : During follicular phase , the primary follicles in the ovary grow to become a fully mature Graafian follicle . Reason : Endometrium of ute
Last Answer : Assertion : During follicular phase , the primary follicles in the ovary grow to become a fully mature ... D. If both Assertion & Reason are False.
Description : Where does the ovum go from the ovary?
Last Answer : Ovaduct
Description : Fertilization of the ovum by the sperm usually occurs in the: a) oviduct b) vagina c) uterus d) ovary
Last Answer : ANSWER: A -- OVIDUCT
Description : There is no DNA in (a) mature RBCs (b) a mature spermatozoan (c) hair root (d) an enucleated ovum
Last Answer : (a) mature RBCs
Description : Which of the following events is not associated with ovulation in human female? (a) Release of secondary oocyte (b) LH surge (c) Decrease in estradiol (d) Full development of Graafian follicle
Last Answer : (c) Decrease in estradiol
Description : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte forms
Last Answer : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte ... One large ovum and 2-3 polar bodies.
Description : Anyone had experience or seriously looked into freezing a reproductive egg (ovum)?
Last Answer : You may want to look at this article. It does not sound promising. Only two in 100 ova are viable on thawing, and they haven't even been fertilized or implanted yet. You can maybe produce as many as 20 eggs ... to find out about them. I wish you the best of luck. I hope you have the child you want.
Description : What is the structure and function of a human ovum(egg) cell? -Biology
Last Answer : answer:
Description : Extrusion of second polar body from egg occurs (a) simultaneously with first cleavage (b) after entry of sperm but before fertilisation (c) after fertilisation (d) before entry of sperm into ovum.
Last Answer : (b) after entry of sperm but before fertilisation
Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function
Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Description : What is the stage of cellular respiration during which carbon dioxide is liberated?
Last Answer : In aerobic cellular respiration the release of carbon dioxide happens in the transformation of pyruvic acid into acetyl-CoA (two molecules) and in the Krebs cycle (four molecules). For each glucose molecule, six carbon dioxide molecules are made.
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 : The stage transferred into the uterus after induced fertilisation of ovum in the laboratory is (a) embryo at 4 blastomeres stage (b) embryo at 2 blastomeres stage (c) morula (d) zygote.
Last Answer : (c) morula
Description : What happens to the egg follicle the ovary?
Last Answer : Need answer
Description : In humans, the development of fertilised egg takes place in the a) ovary b)testis c)oviduct d)uterus
Last Answer : d)uterus
Description : What release of a mature egg cell every month is?
Description : During single Menstural cycle generally the no of mature egg.
Last Answer : 1
Description : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .
Last Answer : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of ... . If both Assertion & Reason are False.
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 : The primary mechanism of action of the combined estrogen-progestin oral contraceptive pill is: A. Production of cervical mucus hostile to sperm penetration B. Suppression of FSH and ... Making endometrium unsuitable for implantation D. Enhancing uterine contractions to dislodge the fertilized ovum
Last Answer : B. Suppression of FSH and LH release
Description : A chancre is typical of which stage of syphilis? a. Primary b. Secondary c. Tertiary d. Chronic, latent
Last Answer : a. Primary
Description : After the initial development stage and in the absence of pathology, the size of the pulp chamber has been reduced by, A. Deposition of primary dentine B. Deposition of secondary dentine C. Reparative dentine D. Pulp fibrosis E. Deposition of reparative dentine
Last Answer : B. Deposition of secondary dentine
Description : Intentionality is the achievement in this sub-stage of the sensorimotor stage. a. Coordination of Secondary circular reactions b. Primary circular reactions c. Tertiary circular reactions d. Secondary circular reactions
Last Answer : a. Coordination of Secondary circular reactions
Description : The Indian Education Commission (1964-66) has recommended compulsory social service for school children as follows Options: A) 20 days for the lower secondary stage and 20 days for the higher secondary ... stage D) 10 days for the lower secondary stage and 20 days for the higher secondary stage
Last Answer : C) 30 days for the lower secondary and 20 days for the higher secondary stage
Description : Given below is an incomplete table on hormones, their source glands and one major effect of each human body. Identify the option representing correct grouping of hormone its gland and ... hormone (b) Placenta Insulin Vasopressin (c) Ovary Insulin Calcitonin (d) Placenta Glucagon Calcitonin
Last Answer : (a) Ovary Glucagon Growth hormone
Description : Artificial Insemination means (a) artificial introduction of sperms of a healthy donor into the vagina (b) introduction of sperms of a healthy donor directly into the ovary (c) transfer of sperms of a ... of sperms of husband to a test tube containing ova. (NEET 2013) 40. The stage transferred
Last Answer : (a) artificial introduction of sperms of a healthy donor into the vagina
Description : In “Product Life Cycle†in _______ stage market becomes saturated a.Mature stage b.Growth stage c.Decline stage d.Introduction stage
Last Answer : a.Mature stage
Description : In “Product Life Cycle†a stage in which buyers move on to other products and salesdrop is known as_____. a.Growth stage b.Introduction stage c.Mature stage d.Decline stage
Last Answer : d.Decline stage
Description : In “Product Life Cycle†a stage represents a new and previously unknown product forbuyers known as_____. a.Mature stage b.Introduction stage c.Decline stage d.None of the above
Last Answer : b.Introduction stage
Description : In “Product Life Cycle†a stage represents rapid growth of product sale known as_____. a.Saturation stage b.Mature stage c.Growth stage d.Introduction stage
Last Answer : c.Growth stage
Description : Which of the following is a stage of Product Life Cycle? a.Introduction stage b.Growth stage c.Mature stage d.All of the above
Last Answer : d.All of the above
Description : Which of the following statements is not true for retroviruses? (a) DNA is not present at any stage in the life cycle of retroviruses. (b) Retroviruses carry gene for RNA-dependent DNA ... mature retroviruses is RNA. (d) Retroviruses are causative agents for certain kinds of cancer in man.
Last Answer : (a) DNA is not present at any stage in the life cycle of retroviruses
Description : Basal applications will be more effective during which stage a). active b). mature c). Dormant d). None
Last Answer : c). Dormant
Description : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of
Last Answer : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of A. Granulosa cells B. Zona pellucida C. Cumulus oophorus D. Theca.
Description : Secodnary oocyte is formed
Last Answer : Secodnary oocyte is formed A. Before ovum maturation B. After mitosis of germinal cells C. After fertilization D. Before fertilization
Description : Assertion : Menarche starts around the age of puberty . Reason : After birth oocyte is matured and developed to form Graafian follicle .
Last Answer : Assertion : Menarche starts around the age of puberty . Reason : After birth oocyte is matured and ... D. If both Assertion & Reason are False.
Description : A matured mammalian cell without nucleus is – (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : (2) Erythrocyte Explanation: Mammalian erythrocytes are unique among the vertebrates as they are nonnucleated cells in their mature form. These cells have nuclei during early phases of ... lose all other cellular organelles such as their mitochondria, Golgi apparatus and endoplasmic reticulum.
Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.
Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.
Description : A matured mammalian cell without nucleus is (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : Erythrocyte
Description : RNA transcription is more complex in eukaryotes because it is first made as a primary RNA transcript that contains intron and exon sequences. What kind of modification must occur to produce a mature mRNA?
Last Answer : RNA splicing. Introns must be removed and exons are spliced together to form a mature RNA transcript.
Description : When egg albumin is heated till it is coagulated, the secondary and tertiary structures of the proteins are completely lost resulting in a mixture of randomly arranged (A) Dipeptide chains (B) Tripeptide chains (C) Polypeptide chains(D) All of these
Last Answer : Answer : C
Description : Double fertilisation is fusion of (a) two eggs (b) two eggs and polar nuclei with pollen nuclei (c) one male gamete with egg and other with synergid (d) one male gamete with egg and other with secondary nucleus.
Last Answer : (d) one male gamete with egg and other with secondary nucleus.
Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells
Last Answer : d) Egg cell and antipodal cells