Which type of the fruit formed without fertilisation? -Do You Know?

Which type of the fruit formed without fertilisation? -Do You Know?
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Which type of the fruit formed without fertilisation?

Description : Which type of the fruit formed without fertilisation?

Last Answer : Parthenocarpy

Which type of the fruit formed without fertilisation?

Description : Which type of the fruit formed without fertilisation?

Last Answer : Parthenocarpy

Parthenogenesis is (a) development of embryo without fertilisation (b) development of fruit without fertilisation (c) development of fruit without hormones (d) development of embryo from egg without fertilisation.

Description : Parthenogenesis is (a) development of embryo without fertilisation (b) development of fruit without fertilisation (c) development of fruit without hormones (d) development of embryo from egg without fertilisation.

Last Answer : (d) development of embryo from egg without fertilisation.

In the case of a ‘test-tube baby’ where does fertilisation take place? -Do You Know?

Description : In the case of a ‘test-tube baby’ where does fertilisation take place? -Do You Know?

Last Answer : answer:

Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Description : Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Last Answer : (a) Ovules develop into embryo sac.

Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into (a) uterus (b) fallopian tube (c) fimbriae (d) cervix.

Description : Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into (a) uterus (b) fallopian tube (c) fimbriae (d) cervix.

Last Answer : (a) uterus

Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Last Answer : (a) two polar nuclei and one male gamete

Development of fruite without fertilisation is

Description : Development of fruite without fertilisation is

Last Answer : Development of fruite without fertilisation is A. Parthenogensis B. Parthenocarpy C. Apospory D. Apogamy

Seed formation without fertilisation in flowering plants involves the process of (a) somatic hybridisation (b) apomixis (c) sporulation (d) budding

Description : Seed formation without fertilisation in flowering plants involves the process of (a) somatic hybridisation (b) apomixis (c) sporulation (d) budding

Last Answer : (b) apomixis

In some plants, the female gamete develops into embryo without fertilisation. This phenomenon is known as (a) parthenogenesis (b) autogamy (c) parthenocarpy (d) syngamy.

Description : In some plants, the female gamete develops into embryo without fertilisation. This phenomenon is known as (a) parthenogenesis (b) autogamy (c) parthenocarpy (d) syngamy.

Last Answer : (a) parthenogenesis

Which of the following is without exception in angiosperms? (a) Presence of vessels (b) Double fertilisation (c) Secondary growth (d) Autotrophic nutrition

Description : Which of the following is without exception in angiosperms? (a) Presence of vessels (b) Double fertilisation (c) Secondary growth (d) Autotrophic nutrition

Last Answer : (b) Double fertilisation

Aquatic animals in which fertilisation occurs in water are said to be a) viviparous without external fertilisation b) oviparous with external fertilisation c) viviparous with internal fertilisation d) oviparous with internal fertilisation

Description : Aquatic animals in which fertilisation occurs in water are said to be a) viviparous without external fertilisation b) oviparous with external fertilisation c) viviparous with internal fertilisation d) oviparous with internal fertilisation

Last Answer : b) oviparous with external fertilisation

What is development of fruit without fertilization called? -Do You Know?

Description : What is development of fruit without fertilization called? -Do You Know?

Last Answer : answer:

How does fertilisation take place? Fertilisation occurs once in a month. Comment. -Biology

Description : How does fertilisation take place? Fertilisation occurs once in a month. Comment. -Biology

Last Answer : Fusion of male gamete sperm and female gamete egg in fallopian tube (oviduct) is called as fertilization. ... Ovulation is release of ovum from ovary into oviduct and takes place only once in a month i.e. 14th day of menstrual cycle. Hence, fertilization can occur only once in a month.

How is the process of pollination different from fertilisation ? -Biology

Description : How is the process of pollination different from fertilisation ? -Biology

Last Answer : The process of pollination is simply the transfer of pollen from one flower to other onto the stigma. The process of fertilization is what happens after the pollen is transferred into the ... takes place only in flowering plants whereas, fertilization happens in almost all animals and plants.

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) 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.

(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.

Explain the events that occur during fertilisation of an ovum in humans. How is it that only one sperm enters the OVUm? -Biology

Description : Explain the events that occur during fertilisation of an ovum in humans. How is it that only one sperm enters the OVUm? -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 ... that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum

Where does fertilisation occur in humans? Explain the events that occur during this process. -Biology

Description : Where does fertilisation occur in humans? Explain the events that occur during this process. -Biology

Last Answer : 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: (i) The sperm reaches the junction of ampulla ... and second polar body. (iv)Nucleus of sperm and of ovum fuses to form a diploid zygote.

How is the entry of only one sperm ensured into an ovum during fertilisation in humans? -Biology

Description : How is the entry of only one sperm ensured into an ovum during fertilisation in humans? -Biology

Last Answer : During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes (depolarisation) in the membrane that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum

Differentiate between ‘self-pollination’ and ‘cross-pollination’. Describe double fertilisation in plants. -Science

Description : Differentiate between ‘self-pollination’ and ‘cross-pollination’. Describe double fertilisation in plants. -Science

Last Answer : answer:

Explain external fertilisation in organisms. -Biology

Description : Explain external fertilisation in organisms. -Biology

Last Answer : answer:

Explain the disadvantages of external fertilisation in organisms. -Biology

Description : Explain the disadvantages of external fertilisation in organisms. -Biology

Last Answer : answer:

Explain the post-fertilisation changes in a flower. -Biology

Description : Explain the post-fertilisation changes in a flower. -Biology

Last Answer : answer:

Carbon dioxides fertilisation effect is

Description : Carbon dioxides fertilisation effect is

Last Answer : Carbon dioxides fertilisation effect is A. Warming effect of `CO_(2)` B. Photosynthetic ... latitudes D. Poleward shifting of temprature zone .

Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage.

Description : Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage.

Last Answer : Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage ... increases nor decreases but forms blasmtomeres.

The fertilisation in mammals including human beings takes place in

Description : The fertilisation in mammals including human beings takes place in

Last Answer : The fertilisation in mammals including human beings takes place in A. Vestibule B. Vagina C. Fallopian tubes D. Uterus

Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of fertilisation are very high during this period.

Description : Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of fertilisation are very high during this period.

Last Answer : Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of ... . D. If both Assertion & Reason are False.

From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm are transported simultaneously to t

Description : From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm are transported simultaneously to t

Last Answer : From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm ... b and c C. c and d D. b and d

What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?

Description : What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?

Last Answer : What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii ... All are methods of conservation of extinct organisms.

The term ‘Test Tube Baby’ implies (a) Fertilisation of ovum takes place I the test tube but it develops in uterus (b) Fertilisation of ovum takes place in the test tube and develops in the test tube itself (c) Fertilisation of the ovum takes place in the uterus but develops in the test tube (d) Fertilisation takes place in uterus and embryo develops in uterus

Description : The term Test Tube Baby' implies (a) Fertilisation of ovum takes place I the test tube but it develops in uterus (b) Fertilisation of ovum takes place in the test tube and develops in ... uterus but develops in the test tube (d) Fertilisation takes place in uterus and embryo develops in uterus

Last Answer : Ans:(a)

A test tube baby means : (1) a baby grown in a test tube. (2) embryo fertilised in uterus and developed in test tube. (3) embryo fertilised and developed in uterus. (4) fertilisation in vitro and then transplantation in the uterus.

Description : A test tube baby means : (1) a baby grown in a test tube. (2) embryo fertilised in uterus and developed in test tube. (3) embryo fertilised and developed in uterus. (4) fertilisation in vitro and then transplantation in the uterus.

Last Answer : (4) fertilisation in vitro and then transplantation in the uterus. Explanation: In vitro fertilisation is a process by which an egg is fertilised by sperm outside the body: in vitro. IVF is a ... to collect a naturally selected ovum (egg) for fertilisation, it is known as natural cycle IVF.

The duration 19-21 days refers to: (1) incubation period of hen's egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

Description : The duration 19-21 days refers to: (1) incubation period of hen's egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during ... to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

Last Answer : (3) the period of menstrual cy-cle soon after menstruation, during which fertilisation is most likely to occur Explanation: The menstrual cycle is the scientific term for the physiological changes ... 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular

Which of the following correctly explains the phenomenon of "Test Tube Bally"? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test tube. (3) When the fertilisation is external and development is internal. (4) When the fertilisation is internal and development is external.

Description : Which of the following correctly explains the phenomenon of "Test Tube Bally"? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test tube ... is external and development is internal. (4) When the fertilisation is internal and development is external.

Last Answer : (3) When the fertilisation is external and development is internal. Explanation: Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg ... ) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.

Fertilisation taking place outside the body of the organism is called

Description : Fertilisation taking place outside the body of the organism is called

Last Answer : external fertilisation.

What is meant by external fertilisation? Give example.

Description : What is meant by external fertilisation? Give example.

Last Answer : Fertilisation taking place outside the body of the organism is called external fertilisation. Ex: Fishes, frog etc.

Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Description : Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Last Answer : (c) loss of half of the short arm of chromosome 5

Sex is determined in human beings (a) by ovum (b) at time of fertilisation (c) 40 days after fertilisation (d) seventh to eight week when genitals differentiate in fetus.

Description : Sex is determined in human beings (a) by ovum (b) at time of fertilisation (c) 40 days after fertilisation (d) seventh to eight week when genitals differentiate in fetus.

Last Answer : (b) at time of fertilisation

Which of the following statements is correct with reference to a test tube baby? (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother where the gestation is completed. (b) Fertilisation of the egg is effected in the female genital tract. It is then taken out and grown in a large test tube. (c) A prematurely born baby is reared in an incubator. (d) Fertilisation of the egg and growth of the embryo are affected in a large test tube.

Description : Which of the following statements is correct with reference to a test tube baby? (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother ... . (d) Fertilisation of the egg and growth of the embryo are affected in a large test tube.

Last Answer : (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother where the gestation is completed.

The test tube baby means (a) fertilisation and development both in uterus (b) fertilisation in vitro and then transplantation in uterus (c) a baby grown in test tube (d) fertilised and developed embryo in test tube.

Description : The test tube baby means (a) fertilisation and development both in uterus (b) fertilisation in vitro and then transplantation in uterus (c) a baby grown in test tube (d) fertilised and developed embryo in test tube.

Last Answer : (b) fertilisation in vitro and then transplantation in uterus

In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? (a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo upto 8 cell stage(c) Embryo of 32 cell stage (d) Zygote only

Description : In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? (a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo upto 8 cell stage (c) Embryo of 32 cell stage (d) Zygote only

Last Answer : (b) Either zygote or early embryo upto 8 cell stage

The technique called Gamete Intra Fallopian Transfer (GIFT) is recommended for those females (a) who cannot produce an ovum (b) who cannot retain the fetus inside uterus (c) whose cervical canal is too narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.

Description : The technique called Gamete Intra Fallopian Transfer (GIFT) is recommended for those females (a) who cannot produce an ovum (b) who cannot retain the fetus inside uterus (c) whose cervical ... narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.

Last Answer : (a) who cannot produce an ovum

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.

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

A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is (a) Gamete Internal Fertilisation and Transfer (b) Germ cell Internal Fallopian Transfer (c) Gamete Inseminated Fallopian Transfer (d) Gamete Intra Fallopian Transfer.

Description : A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is (a) Gamete Internal Fertilisation and Transfer (b) Germ cell Internal Fallopian Transfer (c) Gamete Inseminated Fallopian Transfer (d) Gamete Intra Fallopian Transfer.

Last Answer : (d) Gamete Intra Fallopian Transfer.

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation? (a) Gamete Intracytoplasmic Fallopian Transfer (b) Artificial Insemination (c) Intracytoplasmic sperm injection (d) Intrauterine transfer

Description : In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation? (a) Gamete Intracytoplasmic Fallopian Transfer (b) Artificial Insemination (c) Intracytoplasmic sperm injection (d) Intrauterine transfer

Last Answer : (b) Artificial Insemination

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

Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) Vasectomy Prevents spermatogenesis (c) Barrier methods Prevent fertilisation (d) Intra uterine devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms

Description : Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) ... devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms

Last Answer : (b) Vasectomy Prevents spermatogenesis

A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.

Description : A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.

Last Answer : a) pattern of cleavage