Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation . Reason : The blastocyst , along with zona pel

Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation . Reason : The blastocyst , along with zona pel
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Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation . ... . If both Assertion & Reason are False.
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During fertilization, zona pellucida is dissolved by

Description : During fertilization, zona pellucida is dissolved by

Last Answer : During fertilization, zona pellucida is dissolved by A. Hyaluronidase B. Hyaluronic acid C. Renin D. Acrosin

Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endom

Description : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endom

Last Answer : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona ... . If both Assertion & Reason are False.

What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except the one nearest to the ovum lose their tails. (c) Cells of corona radiata trap all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.

Description : What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except ... all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.

Last Answer : (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida.

Match the following columns and select the correct option. Column-I Column-II (A) Placenta (i) Androgens (B) Zona pellucida (ii) Human Chorionic Gonadotropin (HCG) (C) Bulbourethral glands (iii) Layer of the ovum (D) Leydig cells (iv) Lubrication of the penis (A) (B) (C) (D) (a) (iv) (iii) (i) (ii) (b) (i) (iv) (ii) (iii) (c) (iii) (ii) (iv) (i) (d) (ii) (iii) (iv) (i)

Description : Match the following columns and select the correct option. Column-I Column-II (A) Placenta (i) Androgens (B) Zona pellucida (ii) Human Chorionic Gonadotropin (HCG) (C) Bulbourethral glands (iii) Layer of the ovum (D) Leydig cells (iv) ... (ii) (iii) (c) (iii) (ii) (iv) (i) (d) (ii) (iii) (iv) (i)

Last Answer : (d) (ii) (iii) (iv) (i)

Which of the following layers in an antral follicle is acellular? (a) Stroma (b) Zona pellucida (c) Granulosa (d) Theca interna

Description : Which of the following layers in an antral follicle is acellular? (a) Stroma (b) Zona pellucida (c) Granulosa (d) Theca interna

Last Answer : b) Zona pellucida

During Implantation, the blastocyst beco,es embedded in which layer of the uterus?

Description : During Implantation, the blastocyst beco,es embedded in which layer of the uterus?

Last Answer : During Implantation, the blastocyst beco,es embedded in which layer of the uterus? A. Trophoblast B. Endometrium C. Myometrium D. Perimetrium

What is the work of copper-T? (a) To inhibit ovulation (b) To inhibit fertilisation (c) To inhibit implantation of blastocyst (d) To inhibit gametogenesis

Description : What is the work of copper-T? (a) To inhibit ovulation (b) To inhibit fertilisation (c) To inhibit implantation of blastocyst (d) To inhibit gametogenesis

Last Answer : c) To inhibit implantation of blastocyst

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.

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.

The following contraceptive acts primarily by interfering with implantation of blastocyst: A. Gossypol B. Centchroman C. Combined estrogen-progestin pill D. Phased pill

Description : The following contraceptive acts primarily by interfering with implantation of blastocyst: A. Gossypol B. Centchroman C. Combined estrogen-progestin pill D. Phased pill

Last Answer : B. Centchroman

(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

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.

How old was Pel, the youngest goal scorer of the 1958 World Cup ?

Description : How old was Pel, the youngest goal scorer of the 1958 World Cup ?

Last Answer : Pelেলের, the youngest goal scorer in the 1958 World Cup, was 18 years and 239 days old.

An igneous rock which is commonly black, has a glassy texture, and has a conchoidal (pron: kong-koid-al) fracture is whic of the following? w) pelite (pron: pel-ite) x) calcite y) obsidian z) none of the above

Description : An igneous rock which is commonly black, has a glassy texture, and has a conchoidal (pron: kong-koid-al) fracture is whic of the following? w) pelite (pron: pel-ite) x) calcite y) obsidian z) none of the above

Last Answer : ANSWER: Y -- OBSIDIAN

Statement S. After implantation, the uterine endometrium undergoes changes to become decidus Reason R. the placenta in described as deciduous type Cor

Description : Statement S. After implantation, the uterine endometrium undergoes changes to become decidus Reason R. the placenta in described as deciduous type Cor

Last Answer : Statement S. After implantation, the uterine endometrium undergoes changes to become decidus Reason R. the ... and R is a correct explanation to S.

What is blastocyst? -Biology

Description : What is blastocyst? -Biology

Last Answer : answer:

What is blastocyst? -Biology

Description : What is blastocyst? -Biology

Last Answer : answer:

What is a blastocyst ?

Description : What is a blastocyst ?

Last Answer : The union of mature sperm and ovum occurs in the ovaries of the wife. The fertilized egg slowly progresses towards the ovary to the uterus and at the same time its cell division or cleavage continues. ... division it turns from the ovary to the uterus. At this stage the embryo is called blastocyst.

Fixing up of the blastocyst in the wall of the uterus is known as:

Description : Fixing up of the blastocyst in the wall of the uterus is known as:

Last Answer : Fixing up of the blastocyst in the wall of the uterus is known as: A. Fertilization B. Implantation C. Impreganation D. Placentation

The blastomeres in the blastocyst are arranged into an outer layer `____A____` and inner group of cells attached to trophoblast called the `___B____`.

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

Zona glomerulosa of adrenal cortex synthesises (A) Glucocorticoids (B) Mineralocorticoids (C) Androgens (D) Estrogen and progesterone HORMONE METABOLISM 223

Description : Zona glomerulosa of adrenal cortex synthesises (A) Glucocorticoids (B) Mineralocorticoids (C) Androgens (D) Estrogen and progesterone HORMONE METABOLISM 223

Last Answer : Answer : A

Catecholamine hormones are synthesized in the (A) Chromaffin cells of adrenal medulla (B) Zona glomerulosa of adrenal cortex (C) Zona fasciculate of adrenal cortex (D) Zona reticularis of adrenal cortex

Description : Catecholamine hormones are synthesized in the (A) Chromaffin cells of adrenal medulla (B) Zona glomerulosa of adrenal cortex (C) Zona fasciculate of adrenal cortex (D) Zona reticularis of adrenal cortex

Last Answer : Answer : A

Aldosterone synthesis occurs in (A) Zona reticularis (B) Zona fasciculata (C) Zona glomerulosa (D) Chromaffian cells

Description : Aldosterone synthesis occurs in (A) Zona reticularis (B) Zona fasciculata (C) Zona glomerulosa (D) Chromaffian cells

Last Answer : Answer : C

Cortisol is synthesized in (A) Zona fasiculata (B) Zona glomerulosa (C) Zona reticularis (D) Chromaffin cells

Description : Cortisol is synthesized in (A) Zona fasiculata (B) Zona glomerulosa (C) Zona reticularis (D) Chromaffin cells

Last Answer : Answer : A

The following are true about the hormones secreted by the adrenal cortex: a. zona fasciculata secretes cortisol b. zona glomerulosa secretes aldosterone c. secretion of aldosterone is stimulated by ACTH d. all

Description : The following are true about the hormones secreted by the adrenal cortex: a. zona fasciculata secretes cortisol b. zona glomerulosa secretes aldosterone c. secretion of aldosterone is stimulated by ACTH d. all

Last Answer : all

Identify the human developmental stage shown as well as the related right place of its occurrence in a normal pregnant woman and select the right option for the two, together. Developmental Site of occurrence stage (a) Late morula – Middle part of Fallopian tube (b) Blastula – End part of Fallopian tube (c) Blastocyst – Uterine wall (d) 8-celled morula – Starting point of Fallopian tube

Description : Identify the human developmental stage shown as well as the related right place of its occurrence in a normal pregnant woman and select the right option for the two, together. Developmental Site of ... tube (c) Blastocyst - Uterine wall (d) 8-celled morula - Starting point of Fallopian tube

Last Answer : (c) Blastocyst – Uterine wall

Assertion `:-` Acid which reach intestine does not damage it. Reason `:-` The mucous along with the bicarbonates from the pancreas protects the intest

Description : Assertion `:-` Acid which reach intestine does not damage it. Reason `:-` The mucous along with the bicarbonates from the pancreas protects the intest

Last Answer : Assertion `:-` Acid which reach intestine does not damage it. Reason `:-` The mucous along with ... False. D. If both Assertion & Reason are false.

Assertion(A): In the fermentation process of molasses, along with yeast `(NH_(4))_(2)SO_(4), (NH_(4))_(3) PO_(4)` is added Reason (R): `(NH_(4))_(3)PO

Description : Assertion(A): In the fermentation process of molasses, along with yeast `(NH_(4))_(2)SO_(4), (NH_(4))_(3) PO_(4)` is added Reason (R): `(NH_(4))_(3)PO

Last Answer : Assertion(A): In the fermentation process of molasses, along with yeast `(NH_(4))_(2)SO_(4), (NH_(4))_ ... but R is false D. A is false but R is true

Assertion : Dark reactions of photosynthesis are temperauture -controlled processes. Reason : Most of the reactions are enzymatic in nature.

Description : Assertion : Dark reactions of photosynthesis are temperauture -controlled processes. Reason : Most of the reactions are enzymatic in nature.

Last Answer : Assertion : Dark reactions of photosynthesis are temperauture -controlled processes. Reason : Most of the ... If both Assertion and Reason are false.

Assertion (A): Pressure, volume, and temperature are all extensive properties. Reason (R ) : Extensive properties depend upon the amount and nature of

Description : Assertion (A): Pressure, volume, and temperature are all extensive properties. Reason (R ) : Extensive properties depend upon the amount and nature of

Last Answer : Assertion (A): Pressure, volume, and temperature are all extensive properties. Reason (R ) : Extensive ... . D. If both Assertion & Reason are false.

Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference in the nature of wettibility of different ore

Description : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference in the nature of wettibility of different ore

Last Answer : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference ... -1 is false but Statement -2 is true

Assertion : Dry `SO_(2)` does not bleach dry flowers Reason: The bleaching action of `SO_(2)` is due to its readucing nature

Description : Assertion : Dry `SO_(2)` does not bleach dry flowers Reason: The bleaching action of `SO_(2)` is due to its readucing nature

Last Answer : Assertion : Dry `SO_(2)` does not bleach dry flowers Reason: The bleaching action of `SO_(2 ... Statement-I is not correct and Statement-II is correct

(a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

Description : (a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

Last Answer : ANS (a) (i) OVARY (ii) FALLOPIAN TUBE (iii) AMPULLA-ISTHAMUS JUNCTION OF FALLOPIAN TUBE (iv) ENDOMETRIUM LINING OF UTERUS (b) HUMAN CHORIONIC GONADOTROPIN AND HUMAN PLACENTAL LACTOGEN

The most important feature of the Indian Parliament is that – (1) it is the Union Legislature in India (2) it also comprises the President (3) it is bicameral in nature (4) the Upper House of the Parliament is never dissolved

Description : The most important feature of the Indian Parliament is that – (1) it is the Union Legislature in India (2) it also comprises the President (3) it is bicameral in nature (4) the Upper House of the Parliament is never dissolved

Last Answer : (4) the Upper House of the Parliament is never dissolved Explanation: Although all the four options form the distinctive features &the Indian Parliament, the most important feature is that its upper house (Rajya Sabha) is permanent. It doesn't get dissolved unlike the Lok Sabha.

The most important feature of the Indian Parliament is that - (1) It is the Union Legislature in India (2) It also comprises of the President (3) It is bicameral in nature (4) The Upper House of the Parliament is never dissolved

Description : The most important feature of the Indian Parliament is that - (1) It is the Union Legislature in India (2) It also comprises of the President (3) It is bicameral in nature (4) The Upper House of the Parliament is never dissolved

Last Answer : (3) It is bicameral in nature Explanation: Bicameralism has been one of the most important features of India's parliamentary democracy. Ever since the coming into force of the Constitution, both the Chambers of Indian Parliament have been complementing each other in more ways than one.

1. Which can be abolished but not dissolved? 2. Which is not electromagnetic in nature? 3. Who has written the famous book ‘Mankind and Mother Earth? 4. Which would be the shortest route from San Francisco to Vladivostok? 5. Who founded the ‘East India Association’?

Description : 1. Which can be abolished but not dissolved? 2. Which is not electromagnetic in nature? 3. Who has written the famous book Mankind and Mother Earth? 4. Which would be the ... included in the North-West pacific fishing grounds? 20. When did Ikhtiyaruddin-bin-Bakhtiyar Khalji invade Bengal?

Last Answer : Answer : 1. State Legislative Council 2. Cathode rays 3. Bertrand Russell 4. Flying over the Pacific Ocean 5. Dadabhai Naoroji 6. Promoting adult literacy 7. 7.35-7.45 8. Union Government 9. Change of ... 15. Kural 16. Ronald Ross 17. 66 subjects 18. Total internal reflection 19. Japan 20. 1206 AD

Why is PGD (pre-implantation genetic diagnosis) a bad thing to use for gender selection of your child?

Description : Why is PGD (pre-implantation genetic diagnosis) a bad thing to use for gender selection of your child?

Last Answer : Well do you think in China any girls would be born, they already think of having a girl as something bad. So how many couples in China would opt to have a girl vs a boy, do you think it ... if we start doing this type of selection here in the US then all other countries are going to follow suit.

Ladies, please help. Implantation bleeding?

Description : Ladies, please help. Implantation bleeding?

Last Answer : It’s really hard to say. More than 75% of pregnancies result in early termination, usually before the person realizes she was pregnant.

Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta. [All India 2010] or Explain the process of fertilisation in human female and trace the post-fertilisation events in a sequential order up to implantation of the embryo. [Foreign 2010] -Biology

Description : Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta. [All India 2010] or Explain the process of fertilisation in human female ... events in a sequential order up to implantation of the embryo. [Foreign 2010] -Biology

Last Answer : Post-zygotic events leading to implantation and placenta formation. After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by ... acts as an endocrine gland and secretes hormones like hPL, hCG, oestrogen and progesterone.

(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 is Implantation ?

Description : What is Implantation ?

Last Answer : Implantation is the process by which the uterine endometrium is placed in the zygote blastocyst state after fertilization.

What are the advantages and limitations implantation of ion implantation?

Description : What are the advantages and limitations implantation of ion implantation?

Last Answer : Advantages: • Accurate control over doping • Very good reproducibility • Precise resistance value • A room temperature process Limitations: • Annealing at higher temperature is required for avoiding the crystal damage • The possibility of dopant implanting through various layers of wafer.

Given below are four methods (A-D) and their modes of action (i-iv) in achieving contraception. Select their correct matching from the four options that follow. Method Mode of Action A. The pill (i) Prevents sperms reaching cervix B. Condom (ii) Prevents implantation C. Vasectomy (iii) Prevents ovulation D. Copper T (iv) Semen contains no sperms (a) A – (iii), B – (iv), C – (i), D – (ii) (b) A – (ii), B – (iii), C – (i), D – (iv) (c) A – (iii), B – (i), C – (iv), D – (ii) (d) A – (iv), B – (i), C – (ii), D – (iii)

Description : Given below are four methods (A-D) and their modes of action (i-iv) in achieving contraception. Select their correct matching from the four options that follow. Method Mode of Action A. The pill (i) Prevents sperms reaching cervix B. Condom ... D - (ii) (d) A - (iv), B - (i), C - (ii), D - (iii)

Last Answer : A – (iii), B – (i), C – (iv), D – (

Cu ions released from copper-releasing intra uterine devices (IUDs) (a) make uterus unsuitable for implantation (b) increase phagocytosis of sperms (c) suppress sperm motility (d) prevent ovulation.

Description : Cu ions released from copper-releasing intra uterine devices (IUDs) (a) make uterus unsuitable for implantation (b) increase phagocytosis of sperms (c) suppress sperm motility (d) prevent ovulation.

Last Answer : suppress sperm motility

The function of copper ions in copper releasing IUDs is (a) they inhibit gametogenesis (b) they make uterus unsuitable for implantation (c) they inhibit ovulation (d) they suppress sperm motility and fertilising capacity of sperms.

Description : The function of copper ions in copper releasing IUDs is (a) they inhibit gametogenesis (b) they make uterus unsuitable for implantation (c) they inhibit ovulation (d) they suppress sperm motility and fertilising capacity of sperms.

Last Answer : (d) they suppress sperm motility and fertilising capacity of sperms.

Select the correct option describing gonadotropin activity in a normal pregnant female. (a) High level of FSH and LH stimulates the thickening of endometrium. (b) High level of FSH and LH facilitates implantation of the embryo. (c) High level of hCG stimulates the synthesis of estrogen and progesterone. (d) High level of hCG stimulates the thickening of endometrium.

Description : Select the correct option describing gonadotropin activity in a normal pregnant female. (a) High level of FSH and LH stimulates the thickening of endometrium. (b) High level of FSH and LH ... synthesis of estrogen and progesterone. (d) High level of hCG stimulates the thickening of endometrium.

Last Answer : (c) High level of hCG stimulates the synthesis of estrogen and progesterone.

Ectopic pregnancies are referred to as (a) implantation of defective embryo in the uterus (b) pregnancies terminated due to hormonal imbalance(c) pregnancies with genetic abnormality (d) implantation of embryo at site other than uterus.

Description : Ectopic pregnancies are referred to as (a) implantation of defective embryo in the uterus (b) pregnancies terminated due to hormonal imbalance (c) pregnancies with genetic abnormality (d) implantation of embryo at site other than uterus.

Last Answer : (d) implantation of embryo at site other than uterus.

In human females, meiosis-II is not completed until (a) uterine implantation (b) birth (c) puberty (d) fertilisation.

Description : In human females, meiosis-II is not completed until (a) uterine implantation (b) birth (c) puberty (d) fertilisation.

Last Answer : (d) fertilisation.

For the implantation of fertilize ova uterus secret which harmone?

Description : For the implantation of fertilize ova uterus secret which harmone?

Last Answer : Estrogen

The function of copper ions in copper releasing IUD's is : (1) They inhibit gametogenesis (2) They make uterus unsuitable for implantation (3) They inhibt ovulation (4) The suppress sperm motility and fertilising capacity of sperms

Description : The function of copper ions in copper releasing IUD's is : (1) They inhibit gametogenesis (2) They make uterus unsuitable for implantation (3) They inhibt ovulation (4) The suppress sperm motility and fertilising capacity of sperms

Last Answer : (4) The suppress sperm motility and fertilising capacity of sperms

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was (1) High level of circulating HCG to stimulate estrogen and progesterone synthesis (2) High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo (3) High level of circulating HCG to stimulate endometrial thickening (4) High levels of FSH and LH in uterus to stimulate endometrial thickening

Description : In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was (1) High level of circulating HCG to stimulate estrogen and progesterone synthesis (2) ... endometrial thickening (4) High levels of FSH and LH in uterus to stimulate endometrial thickening

Last Answer : (1) High level of circulating HCG to stimulate estrogen and progesterone synthesis