NAME THE PHENOMENON AND ONE BIRD WHERE THE FEMALE GAMETE DIRECTLY DEVELOPS INTO A NEW ORGANISM.

NAME THE PHENOMENON AND ONE BIRD WHERE THE FEMALE GAMETE DIRECTLY
DEVELOPS INTO A NEW ORGANISM.
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1 Answer

Answer :

ANS. PARTHENOGENESIS, TURKEY.
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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

DESCRIBE THE PROCESS OF OOGENESIS IN HUMAN FEMALE AND DIFFERENTIATE IT WITH SPERMATOGENESIS ON THE BASIS OF TIME OF INITIATION AND THE PRODUCTS FORMED.

Description : DESCRIBE THE PROCESS OF OOGENESIS IN HUMAN FEMALE AND DIFFERENTIATE IT WITH SPERMATOGENESIS ON THE BASIS OF TIME OF INITIATION AND THE PRODUCTS FORMED.

Last Answer : ANS. OOGENESIS : DIAGRAMMATIC REPRESENTATION AS GIVEN IN NCERT. DIFFERENCES BETWEEN : OOGENESIS SPERMATOGENESIS (i) STARTS DURING FOETAL LIFE (i) STARTS DURING PUBERTY (ii)PRODUCTS: OVUM (ii) SPERMS

(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

WHAT IS APOMIXIS? DESCRIBE ITS IMPORTANCE?

Description : WHAT IS APOMIXIS? DESCRIBE ITS IMPORTANCE?

Last Answer : ANS. IT IS THE PROCESS OF DEVELOPMENT OF SEEDS WITHOUT FERTILISATION. EXAMPLE: SOME SPECIES OF ASTERACEAE AND GRASSES. IMPORTANCE: APOMICTIC GENES CAN BE INTRDUED IN HYBRID SEED INDUSTRY.

(A) MENTION ANY FOUR STRATEGIES ADOPTED BY FLOWERING PLANTS TO PREVENT SELF-POLLINATION. (B) DEFINE THE TERM EMASCULATION.

Description : (A) MENTION ANY FOUR STRATEGIES ADOPTED BY FLOWERING PLANTS TO PREVENT SELF-POLLINATION. (B) DEFINE THE TERM EMASCULATION.

Last Answer : ANS.(a) (i) SELF INCOMPATIBILITY (ii) PRODUCTION OF UNICELLULAR FLOWERS (iii) ANTHERS AND STIGMA ARE PLACED AT DIFFERENT POSITIONS. (iv) MATURATION OF ANTHER AND STIGMA IS NOT ... EMASCULATION: REMOVAL OF ANTHER BEFORE MATURITY SO AS TO ENSURE CROSS POLLINATION IN SELF POLLINATING FLOWERS.

DESCRIBE THE CONTRACEPTIVE ACTIONS OF IUDs.

Description : DESCRIBE THE CONTRACEPTIVE ACTIONS OF IUDs.

Last Answer : ANS. (i) INCREASES PHAGOCYTOSIS OF SPERMS (ii) SUPPRESS SPERM MOTILITY (iii) SUPPRESS FERTILISING CAPACITY OF SPERMS (iv) MAKES CERVIX HOSTILE TO SPERMS.

DIFFERENTIATE BETWEEN MORULA AND BLASTULA STAGES OF MAMMALIAN EMBRYO.

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

WHAT IS CORPUS LUTEUM ? UNDER WHAT CONDITIONS DOES IT UNDERGO DEGENERATION ?

Description : WHAT IS CORPUS LUTEUM ? UNDER WHAT CONDITIONS DOES IT UNDERGO DEGENERATION ?

Last Answer : ANS. THE CORPUS LUTEUM IS FORMED IN THE MAMMALIAN OVARY FROM RUPTURED GRAAFIAN FOLLICLE AFTER OVULATION. IT DEGENERATES IN THE ABSENCE OF FERTILISATION, AS THE LEVEL OF FSH AND LH DROPS.

WRITE THE FUNTION OF EACH OF THE FOLLOWING: (a) MIDDLE PIECE OF HUMAN SPERM (b) LUTEINIZING HORMONE IN HUMAN MALES

Description : WRITE THE FUNTION OF EACH OF THE FOLLOWING: (a) MIDDLE PIECE OF HUMAN SPERM (b) LUTEINIZING HORMONE IN HUMAN MALES

Last Answer : ANS. (a) PROVIDES ENERGY FOR MOVEMENT DUE TO PRESENCE OF MITOCHONDRIA. (c) STIMULATES SYNTHESIS AND SECRETION OF ANDROGENS.

STATE ONE ADVANTAGE AND ONE DISADVANTAGE OF CLEISTOGAMY.

Description : STATE ONE ADVANTAGE AND ONE DISADVANTAGE OF CLEISTOGAMY.

Last Answer : ANS. ADVANTAGE: ASSURED SEED SET DISADVANTAGE: INBREEDING DEPRESSION.

WHY IS THE PROCESS OF FERTILISATION IN A FLOWERING PLANT REFFERED TO AS DOUBLE FERTILISATION ?

Description : WHY IS THE PROCESS OF FERTILISATION IN A FLOWERING PLANT REFFERED TO AS DOUBLE FERTILISATION ?

Last Answer : ANS. DOUBLE FERTILISATION= SYNGAMY + TRIPLE FUSION SYNGAMY= ONE MALE GAMETE + EGG--- ZYGOTE(n) TRIPLE FUSION= ANOTHER MALE GAMETE+ POLAR NUCLEI-PRIMARY ENOSPERM NUCLEUS(3n)

WHEN DO THE OOGENESIS AND THE SPERMATOGENESIS INITIATE IN HUMAN FEMALES AND MALES RESPECTIVELY ?

Description : WHEN DO THE OOGENESIS AND THE SPERMATOGENESIS INITIATE IN HUMAN FEMALES AND MALES RESPECTIVELY ?

Last Answer : ANS. OOGENESIS AT THE FOETAL LIFEAND SPERMATOGENISIS STARTS AT PUBERTY.

WRITE THE LOCATION AND FUNCTION OF SERTOLI CELLS IN HUMANS.

Description : WRITE THE LOCATION AND FUNCTION OF SERTOLI CELLS IN HUMANS.

Last Answer : ANS. IN THE SEMINIFEROUS TUBULES OF TESTIS, NOURISHES DEVELOPING SPERMS.

AT WHAT STAGE IS THE MAMMALIAN EMBRYO IMPLANTED IN THE UTERUS ?

Description : AT WHAT STAGE IS THE MAMMALIAN EMBRYO IMPLANTED IN THE UTERUS ?

Last Answer : ANS. AT THE BLASTOCYST STAGE.

NAME THE PROTECTIVE SUBSTANCE PRESENT IN THE POLLEN ENVELOPE TO TIDE OVER ADVERSE CONDITIONS.

Description : NAME THE PROTECTIVE SUBSTANCE PRESENT IN THE POLLEN ENVELOPE TO TIDE OVER ADVERSE CONDITIONS.

Last Answer : ANS. SPOROPOLLENIN.

NAME THE TYPE OF FLOWER WHICH FAVOURS CROSS POLLINATION.

Description : NAME THE TYPE OF FLOWER WHICH FAVOURS CROSS POLLINATION.

Last Answer : ANS. CHASMOGAMOUS.

WHAT IS PERISPERM ?

Description : WHAT IS PERISPERM ?

Last Answer : ANS. THE RESIDUAL NUCELLUS, WHICH PERSISTS IN THE SEEDS IS CALLED AS PERISPERM.

WHY ARE DATE PALMS REFFERED TO AS DIOECIOUS ?

Description : WHY ARE DATE PALMS REFFERED TO AS DIOECIOUS ?

Last Answer : ANS. BECAUSE THEY HAVE UNISEXUAL FLOWERS BORNE ON SEPARATE PLANTS.

WHAT TERM IS GIVEN BY YOU TO THE GROUP OF INDIVIDUALS WHICH ARE GENETICALLY AND MORPHOLOGICALLY IDENTICAL ?

Description : WHAT TERM IS GIVEN BY YOU TO THE GROUP OF INDIVIDUALS WHICH ARE GENETICALLY AND MORPHOLOGICALLY IDENTICAL ?

Last Answer : ANS. CLONE

Development of an organism from female gamete/ egg without involving fertilization is (a) adventitive embryony (b) polyembryony (c) parthenocarpy (d) parthenogenesis.

Description : Development of an organism from female gamete/ egg without involving fertilization is (a) adventitive embryony (b) polyembryony (c) parthenocarpy (d) parthenogenesis.

Last Answer : (d) parthenogenesis.

In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Description : In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Last Answer : The number of chromosome in the female gamete would be same as that in the male gamete, i.e., it will have 24 chromosomes. The number of chromosome in the zygote would be double the number present in the gamete and hence, it would be 48.

The process of releasing the ripe female gamete from the ovary is called

Description : The process of releasing the ripe female gamete from the ovary is called

Last Answer : The process of releasing the ripe female gamete from the ovary is called A. Ovulation B. Parturition C. Implantation D. Fertilisation

The female gamete producing structure of bryophyte is

Description : The female gamete producing structure of bryophyte is

Last Answer : archegonia.

The microsporogenesis is the formation of a. Male gamete b. Female gamtete c. Female and male gamete d. Non of these

Description : The microsporogenesis is the formation of a. Male gamete b. Female gamtete c. Female and male gamete d. Non of these

Last Answer : Male gamete

Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.

Description : Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.

Last Answer : (c) two homologous chromosomes

Select the wrong statement. (a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile. (b) Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy. (c) Isogametes are similar in structure, function and behaviour. (d) Anisogametes differ either in structure, function or behaviour.

Description : Select the wrong statement. (a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile. (b) Chlamydomonas exhibits both isogamy and anisogamy and ... in structure, function and behaviour. (d) Anisogametes differ either in structure, function or behaviour.

Last Answer : (a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile.

After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?

Description : After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?

Last Answer : mitosis and diffrentiation

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.

When the embryo develops from haploid egg cell without fertilization, the phenomenon is called as

Description : When the embryo develops from haploid egg cell without fertilization, the phenomenon is called as

Last Answer : When the embryo develops from haploid egg cell without fertilization, the phenomenon is called as – Haploid parthenogenesis

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.

Is a form of problem solving in which the organism develops a sudden understanding of a problem's solution.?

Description : Is a form of problem solving in which the organism develops a sudden understanding of a problem's solution.?

Last Answer : Need answer

Which sensor shown in the illustration develops its own conditioning and point setting and 'reports' directly to the 'annunciator'? EL-0094 A. Transducer B. Resistance Temperature Detector (RTD) C. Pressure Switch D. Thermocouple

Description : Which sensor shown in the illustration develops its own conditioning and point setting and 'reports' directly to the 'annunciator'? EL-0094 A. Transducer B. Resistance Temperature Detector (RTD) C. Pressure Switch D. Thermocouple

Last Answer : Answer: C

This strategy develops over time, through everyday routines, activities and processes that may not be directly related to strategy development. A. Intended strategy B. Realized strategy C. Emergent strategy D. None of these options are valid

Description : This strategy develops over time, through everyday routines, activities and processes that may not be directly related to strategy development. A. Intended strategy B. Realized strategy C. Emergent strategy D. None of these options are valid

Last Answer : Emergent strategy

This strategy develops over time, through everyday routines, activities and processes that may not be directly related to strategy development. A. Intended strategy B. Realized strategy C. Emergent strategy D. None of these options are valid.

Description : This strategy develops over time, through everyday routines, activities and processes that may not be directly related to strategy development. A. Intended strategy B. Realized strategy C. Emergent strategy D. None of these options are valid.

Last Answer : Emergent strategy

The following is true of anti-H.pylori therapy except: A. It is indicated in all patients of peptic ulcer B. Resistance to any single antimicrobial drug develops rapidly C. Concurrent suppression of gastric acid enhances efficacy of the regimen D. Colloidal bismuth directly inhibits H.pylori but has poor patient acceptability

Description : The following is true of anti-H.pylori therapy except: A. It is indicated in all patients of peptic ulcer B. Resistance to any single antimicrobial drug develops rapidly C. Concurrent ... efficacy of the regimen D. Colloidal bismuth directly inhibits H.pylori but has poor patient acceptability

Last Answer : A. It is indicated in all patients of peptic ulcer

Which is the structure in which the female gametophyte develops? -Biology

Description : Which is the structure in which the female gametophyte develops? -Biology

Last Answer : answer:

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because (a) female gametophyte is free and gets dispersed like seeds (b) female gametophyte lacks archegonia (c) megaspores possess endosperm and embryo surrounded by seed coat (d) embryo develops in female gametophyte which is retained on parent sporophyte.

Description : Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because (a) female gametophyte is free and gets dispersed like seeds (b) female gametophyte ... by seed coat (d) embryo develops in female gametophyte which is retained on parent sporophyte.

Last Answer : (b) female gametophyte lacks archegonia

In Which kind of organisms is the phenomenon found wherein the female kills the male after copulation? -Do You Know?

Description : In Which kind of organisms is the phenomenon found wherein the female kills the male after copulation? -Do You Know?

Last Answer : answer:

An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called (a) pseudopollination (b) pseudoparthenocarpy (c) mimicry (d) pseudocopulation.

Description : An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female species and tries ... phenomenon is called (a) pseudopollination (b) pseudoparthenocarpy (c) mimicry (d) pseudocopulation.

Last Answer : (d) pseudocopulation.

In Which kind of organisms is the phenomenon found wherein the female kills the male after copulation?

Description : In Which kind of organisms is the phenomenon found wherein the female kills the male after copulation?

Last Answer : Spider

Each new sex cell is called a. Gamete b. embryo c. zygote d. -----

Description : Each new sex cell is called a. Gamete b. embryo c. zygote d. -----

Last Answer : Gamete

The disease causing organisms identified by this name have nothing to do with trees or forests. The name actually connects the organism directly to their vectors. What term are we looking for?

Description : The disease causing organisms identified by this name have nothing to do with trees or forests. The name actually connects the organism directly to their vectors. What term are we looking for?

Last Answer : Arboviruses.

How did male and female evolve from an asexual organism?

Description : How did male and female evolve from an asexual organism?

Last Answer : It is not clear that they did. The two forms of reproduction could have developed separately.

What group would you classify a female organism that is covered in fur and that provides milk for its young?

Description : What group would you classify a female organism that is covered in fur and that provides milk for its young?

Last Answer : Feel Free to Answer

If a male organism has 40 chromosomes in each body cell how many chromosomes does a female of the same species have in each body cell?

Description : If a male organism has 40 chromosomes in each body cell how many chromosomes does a female of the same species have in each body cell?

Last Answer : you answer

What is the difference between a gamete and a zygote?

Description : What is the difference between a gamete and a zygote?

Last Answer : A gamete and a zygote are two distinct stages in the process of sexual reproduction in organisms: 1. Gamete: Gametes are specialized reproductive cells that are produced by sexually reproducing ... of two gametes during fertilization, containing the complete set of chromosomes for a new organism.

What is the difference between a zygote and a gamete?

Description : What is the difference between a zygote and a gamete?

Last Answer : A: A zygote is a diploid cell formed by the fusion of two haploid gametes, while a gamete is a haploid cell that is involved in sexual reproduction.

Distinguish between a gamete and zygote. Explain their roles in sexual reproduction -Biology

Description : Distinguish between a gamete and zygote. Explain their roles in sexual reproduction -Biology

Last Answer : Gamete represents the sex cell or germ cell in sexual reproduction. ... Zygote is the product of fertilization in which a male and a female gamete fuse with each other. The two fusing ... characters of their parents in their DNA. Fertilization brings characters of both parents into one zygote cell.

In a flowering plant male gamete is formed inside _____ -Science-7

Description : In a flowering plant male gamete is formed inside _____ -Science-7

Last Answer : In a flowering plant male gamete is formed inside anther.