Explain embryo development in angiosperms. -Biology

Explain embryo development in angiosperms. -Biology
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Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms. (a) Perianth and two integuments (b) Embryo development and apical meristem (c) Absence of resin duct and leaf venation (d) Presence of vessel elements and absence of archegonia

Description : Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms. (a) Perianth and two integuments (b) Embryo development and ... of resin duct and leaf venation (d) Presence of vessel elements and absence of archegonia

Last Answer : (d) Presence of vessel elements and absence of archegonia

Mention the component cells of an embryo sac of angiosperms -Biology

Description : Mention the component cells of an embryo sac of angiosperms -Biology

Last Answer : answer:

Mention the component cells of an embryo sac of angiosperms -Biology

Description : Mention the component cells of an embryo sac of angiosperms -Biology

Last Answer : answer:

Female gametophyte of angiosperms is represented by (a) ovule (b) megaspore mother cell (c) embryo sac (d) nucellus.

Description : Female gametophyte of angiosperms is represented by (a) ovule (b) megaspore mother cell (c) embryo sac (d) nucellus.

Last Answer : (c) embryo sac

In angiosperms, functional megaspore develops into (a) embryo sac (b) ovule (c) endosperm (d) pollen sac.

Description : In angiosperms, functional megaspore develops into (a) embryo sac (b) ovule (c) endosperm (d) pollen sac.

Last Answer : a) embryo sac

In majority of angiosperms, (a) egg has a filiform apparatus (b) there are numerous antipodal cells (c) reduction division occurs in the megaspore mother cells (d) a small central cell is present in that embryo sac.

Description : In majority of angiosperms, (a) egg has a filiform apparatus (b) there are numerous antipodal cells (c) reduction division occurs in the megaspore mother cells (d) a small central cell is present in that embryo sac.

Last Answer : (c) reduction division occurs in the megaspore mother cells

Which is the most common type of embryo sac in angiosperms ? (a) Tetrasporic with one mitotic stage of divisions (b) Monosporic with three sequential mitotic divisions (c) Monosporic with two sequential mitotic divisions (d) Bisporic with two sequential mitotic divisions

Description : Which is the most common type of embryo sac in angiosperms ? (a) Tetrasporic with one mitotic stage of divisions (b) Monosporic with three sequential mitotic divisions (c) Monosporic with two sequential mitotic divisions (d) Bisporic with two sequential mitotic divisions

Last Answer : (b) Monosporic with three sequential mitotic divisions

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of (a) cycads (b) conifers (c) polypetalous angiosperms (d) gamopetalous angiosperms.

Description : Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of (a) cycads (b) conifers (c) polypetalous angiosperms (d) gamopetalous angiosperms.

Last Answer : (a) cycads

In angiosperms, functional megaspore develops into:a) Embryo sacb) Ovulec) Endospermd) Pollen sac

Description : Vegetative propagation is Pistiaoccurs bya) StIn angiosperms, functional megaspore develops into:a) Embryo sacb) Ovulec) Endospermd) Pollen sacolenb) Offsetc) Runnerd) Sucker

Last Answer : Embryo sac

Explain endosperm development in angiosperms. -Biology

Description : Explain endosperm development in angiosperms. -Biology

Last Answer : answer:

In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores

Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores

Last Answer : Ans. ((d))

(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.

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.

Name some insectivorous angiosperms. -Biology

Description : Name some insectivorous angiosperms. -Biology

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Difference between gymnosperms and angiosperms -Biology

Description : Difference between gymnosperms and angiosperms -Biology

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Alternation of generations in angiosperms. -Biology

Description : Alternation of generations in angiosperms. -Biology

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Double fertilization in angiosperms produces? -Biology

Description : Double fertilization in angiosperms produces? -Biology

Last Answer : answer:

Result of double fertilization in angiosperms? -Biology

Description : Result of double fertilization in angiosperms? -Biology

Last Answer : answer:

Double fertilization in angiosperms produces? -Biology

Description : Double fertilization in angiosperms produces? -Biology

Last Answer : answer:

Result of double fertilization in angiosperms? -Biology

Description : Result of double fertilization in angiosperms? -Biology

Last Answer : answer:

What is Study of growth and development of embryo? -General Knowledge

Description : What is Study of growth and development of embryo? -General Knowledge

Last Answer : The answer is 'Embryology'

What is Study of growth and development of embryo? -General Knowledge

Description : What is Study of growth and development of embryo? -General Knowledge

Last Answer : answer:

What is Study of growth and development of embryo? -General Knowledge

Description : What is Study of growth and development of embryo? -General Knowledge

Last Answer : answer:

Which of the following is correct sequence in embryo development

Description : Which of the following is correct sequence in embryo development

Last Answer : Which of the following is correct sequence in embryo development A. Cleavage, gastrualtion ... , gastrulation D. Gastrulation,blastulation,cleavage.

Development of animal embryo from egg without fertilization is called :

Description : Development of animal embryo from egg without fertilization is called :

Last Answer : Development of animal embryo from egg without fertilization is called : A. Parthenogenesis B. Parthenocarpy C. Apospory D. Apomixis

When all cells in the embryo of a multicellular organism are identical. later in development the cells become specialized through a process called?

Description : When all cells in the embryo of a multicellular organism are identical. later in development the cells become specialized through a process called?

Last Answer : What is the answer ?

Some snake embryos have small buds resembling limbs. These buds disappear at later stages of embryo development. These findings suggest that these snakes?

Description : Some snake embryos have small buds resembling limbs. These buds disappear at later stages of embryo development. These findings suggest that these snakes?

Last Answer : hi oops daddy chulo

The emergence and development of seedlings from the seed-embryo under favourable condition

Description : The emergence and development of seedlings from the seed-embryo under favourable condition

Last Answer : Ans. Germination

In the case of test tube babies (1) egg is fertilized in the uterus. (2) embryo completes its development in a test tube. (3) embryo is placed in uterus after 2 months. (4) egg is fertilized outside mother's body.

Description : In the case of test tube babies (1) egg is fertilized in the uterus. (2) embryo completes its development in a test tube. (3) embryo is placed in uterus after 2 months. (4) egg is fertilized outside mother's body.

Last Answer : (3) embryo is placed in uterus after 2 months. Explanation: Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is ... done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods

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.

Define the following: - Development , Embryo , Foetus , Embryology.

Description : Define the following: - Development , Embryo , Foetus , Embryology.

Last Answer : Development: - A fertilized egg or zygote of frog passes through a series of events to form an adult animal. The process is known as development. Embryo: - The developing individual in its ... of development embryo is called a foetus. Embryology: - The study of embryo is called embryology. 

Which of the following statements is not true about somatic embryogenesis? (a) The pattern of development of a somatic embryo is comparable to that of a zygotic embryo. (b) Somatic embryos can develop from microspores. (c) Somatic embryo is induced usually by an auxin such as 2, 4-D. (d) A somatic embryo develops from a somatic cell.

Description : Which of the following statements is not true about somatic embryogenesis? (a) The pattern of development of a somatic embryo is comparable to that of a zygotic embryo. (b) Somatic embryos can develop from ... an auxin such as 2, 4-D. (d) A somatic embryo develops from a somatic cell.

Last Answer : (b) Somatic embryos can develop from microspores.

Development of embryo from unfertilized egg is known as A) Parthenogenesis B) Parthenocarpy C) Apomixsis D) None of the above

Description : Development of embryo from unfertilized egg is known as A) Parthenogenesis B) Parthenocarpy C) Apomixsis D) None of the above

Last Answer : A) Parthenogenesis

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

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.

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.

What is Study of growth and development of embryo?

Description : What is Study of growth and development of embryo?

Last Answer : Embryology

Given below are the events that lead to pregnancy and development of embryo i. fertilisation of egg ii. maturation of egg iii. release of egg iv. embedding of embryo in uterus a) i, ii, iii, iv b)ii, i, iii, iv c)i, iv , ii, iii d)ii, iii, i , iv,

Description : Given below are the events that lead to pregnancy and development of embryo i. fertilisation of egg ii. maturation of egg iii. release of egg iv. embedding of embryo in uterus a) i, ii, iii, iv b)ii, i, iii, iv c)i, iv , ii, iii d)ii, iii, i , iv,

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

1. What is Study of growth and development of embryo? 2. What is the minimum permissible age for employment in any factory or mine? 3. Angular separation between two colours of the spectrum depends upon which thing? 4. Which mountain range stretches from Gujarat in west to Delhi in the north? 5. In which nomad man started settling?

Description : 1. What is Study of growth and development of embryo? 2. What is the minimum permissible age for employment in any factory or mine? 3. Angular separation between two colours of the spectrum depends ... exporting iron ore to Japan? 20. Which site, where Ashokan pillars exist, has the bull capital?

Last Answer : Answer : 1. Embryology 2. 14 years 3. Angle of deviation 4. Aravallis 5. Neolithic Age 6. Vienna 7. Arundhati Roy 8. Sphygmology 9. The Great Himalayan Range 10. Second and seventh 11. ... First 14. Rajasthan 15. Mahavira 16. Thomas Paine 17. Soyabean 18. President 19. Paradeep 20. Rampurva

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

Last Answer : When the fertilisation is external and development is internal.

In the case of test tube babies (1) egg is fertilized in the uterus. (2) embryo completes its development in a test tube. (3) embryo is placed in uterus after 2 months. (4) egg is fertilized outside mother’s body.

Description : In the case of test tube babies (1) egg is fertilized in the uterus. (2) embryo completes its development in a test tube. (3) embryo is placed in uterus after 2 months. (4) egg is fertilized outside mother’s body. 

Last Answer : embryo is placed in uterus after 2 months.

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) When and how does placenta develop in human female? (ii)How is the placenta connected to the embryo? (iii)Placenta acts as an endocrine gland. Explain. -Biology

Description : (i) When and how does placenta develop in human female? (ii)How is the placenta connected to the embryo? (iii)Placenta acts as an endocrine gland. Explain. -Biology

Last Answer : (i)Development of placenta in human female After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by uterine tissue and ... Chorionic Gonadotropin) (b) hPL (human Placental Lactogen) (c) Oestrogens (d) Progesteronem

which of the following structures are found in gymnosperms but not in angiosperms? -General Knowledge

Description : which of the following structures are found in gymnosperms but not in angiosperms? -General Knowledge

Last Answer : Cones are found in gymnosperms but not in angiosperms.

What are the characteristics of angiosperms ?

Description : What are the characteristics of angiosperms ?

Last Answer : Characteristics of angiosperms Plants are sporophytic , flowering , autotrophic and asymptomatic. Body soft or hard , hard or woody , evergreen or deciduous . They are rich in vascular tissue ; Xylem tissue ... Duplication occurs in all cases so the crop is triploid ( 3n) . Clear genealogy exists.

angiosperms Of plants Most Large The tribe What ?

Last Answer : Compositae or Asteraceae .

$ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms.

Description : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms.

Last Answer : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms. A. ... wrong D. If both As and R are wrong.

$ Double fertilization and triple fusion occurs in Angiosperms. ! Triple fusion produces triploid type of endosperm.

Description : $ Double fertilization and triple fusion occurs in Angiosperms. ! Triple fusion produces triploid type of endosperm.

Last Answer : $ Double fertilization and triple fusion occurs in Angiosperms. ! Triple fusion produces triploid type of endosperm ... D. If both As and R are wrong.

$ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia.

Description : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia.

Last Answer : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia. A ... D. If both As and R are wrong.