Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion

Double fertilization is
(1) Fusion of two male gametes of a pollen tube
with two different eggs
(2) Fusion of one male gamete with two polar
nuclei
(3) Fusion of two male gametes with one egg
(4) Syngamy and triple fusion
by

1 Answer

Answer :

(4) Syngamy and triple fusion
by

Related questions

Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Last Answer : (d) syngamy and triple fusion.

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.

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.

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

When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as

Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as

Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization

In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.

Description : In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.

Last Answer : d) synergids.

Syngamy means (a) fusion of gametes (b) fusion of cytoplasms (c) fusion of two similar spores (d) fusion of two dissimilar spores.

Description : Syngamy means (a) fusion of gametes (b) fusion of cytoplasms (c) fusion of two similar spores (d) fusion of two dissimilar spores.

Last Answer : a) fusion of gametes

What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.

Description : What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.

Last Answer : (a) One fuses with the egg and other fuses with central cell nuclei.

Which one of the following is surrounded by a callose wall? (a) Male gamete (b) Egg (c) Pollen grain (d) Microspore mother cell

Description : Which one of the following is surrounded by a callose wall? (a) Male gamete (b) Egg (c) Pollen grain (d) Microspore mother cell

Last Answer : (d) Microspore mother cell

Difference between syngamy and triple fusion -Biology

Description : Difference between syngamy and triple fusion -Biology

Last Answer : answer:

Polar nuclei and double fertilization -Biology

Description : Polar nuclei and double fertilization -Biology

Last Answer : answer:

Polar nuclei and double fertilization -Biology

Description : Polar nuclei and double fertilization -Biology

Last Answer : answer:

$ 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.

What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes

Description : What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes

Last Answer : (c) Initiation of pollen tube

In double fertilization, the two male nuclei fuse with

Description : In double fertilization, the two male nuclei fuse with

Last Answer : In double fertilization, the two male nuclei fuse with – Egg cell and Definitive nucleus

In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Description : In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Last Answer : (a) cellular totipotency

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.

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 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

What is triple fusion? Name the nuclei involved in triple fusion.

Description : What is triple fusion? Name the nuclei involved in triple fusion.

Last Answer : Ans: Fusion of male gamete with diploid secondary nucleus to form triploid primary endosperm nucleus is known as triple fusion. In triple fusion two polar nuclei and one male gamete are involved.

What happens to polar nuclei after fertilization? -Biology

Description : What happens to polar nuclei after fertilization? -Biology

Last Answer : answer:

What happens to polar nuclei after fertilization? -Biology

Description : What happens to polar nuclei after fertilization? -Biology

Last Answer : answer:

Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous

Description : Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous

Last Answer : b)motile male gametes

In angiosperm, triple fusion is necessary for the formation of: (a) Embryo (b) Pollen (c) Endosperm (d) Leaf

Description : In angiosperm, triple fusion is necessary for the formation of: (a) Embryo (b) Pollen (c) Endosperm (d) Leaf

Last Answer : Ans. ((c))

The gametes taking part in double fertilization are

Description : The gametes taking part in double fertilization are

Last Answer : The gametes taking part in double fertilization are A. 5 B. 4 C. 3 D. 2

The plant parts which consist of two generations- one within the other (1) pollen grains inside the anther (2) germinated pollen grain with two male gametes (3) seed inside the fruit (4) embryo sac inside the ovule (a) (1) only (b) (1), (2), and (3) (c) (3) and (4)

Description : The plant parts which consist of two generations- one within the other (1) pollen grains inside the anther (2) germinated pollen grain with two male gametes (3) seed inside the fruit (4) embryo sac inside the ovule (a) (1) only (b) (1), (2), and (3) (c) (3) and (4)

Last Answer : (d) (1) and (4).

$ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule through integuments is called Mesogamy.

Description : $ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule through integuments is called Mesogamy.

Last Answer : $ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule ... wrong D. If both As and R are wrong.

Which one of the following statements is wrong?a)Pollen grains in some plants remain viable for monthsb)Intine is made up of cellulose and pectinc)When pollen is shed at two-celled state, double fertilization does not take placed)Vegetative cell is larger than generative cell

Description : Which one of the following statements is wrong?a)Pollen grains in some plants remain viable for monthsb)Intine is made up of cellulose and pectinc)When pollen is shed at two-celled state, double fertilization does not take placed)Vegetative cell is larger than generative cell

Last Answer : c)When pollen is shed at two-celled state, double fertilization does not take place

Double fertilisation and triple fusion were discovered by (a) Hofmeister (b) Nawaschin and Guignard (c) Leeuwenhoek (d) Strasburger

Description : Double fertilisation and triple fusion were discovered by (a) Hofmeister (b) Nawaschin and Guignard (c) Leeuwenhoek (d) Strasburger

Last Answer : (b) Nawaschin and Guignard

Through which cell of the embryo sac, does the pollen tube enter the embryo sac? (a) Egg cell (b) Persistant synergid (c) Degenerated synergids (d) Central cell

Description : Through which cell of the embryo sac, does the pollen tube enter the embryo sac? (a) Egg cell (b) Persistant synergid (c) Degenerated synergids (d) Central cell

Last Answer : c) Degenerated synergids

What does the filiform apparatus do at the entrance into ovule? (a) It brings about opening of the pollen tube. (b) It guides pollen tube from a synergid to egg. (c) It helps in the entry of pollen tube into a synergid. (d) It prevents entry of more than one pollen tube into the embryo sac

Description : What does the filiform apparatus do at the entrance into ovule? (a) It brings about opening of the pollen tube. (b) It guides pollen tube from a synergid to egg. (c) It helps in the entry of pollen tube into a synergid. (d) It prevents entry of more than one pollen tube into the embryo sac

Last Answer : (b) It guides pollen tube from a synergid to egg.

In gymnosperms, the pollen chamber represents (a) a cavity in the ovule in which pollen grains are stored after pollination (b) an opening in the megagametophyte through which the pollen tube approaches the egg(c) the microsporangium in which pollen grains develop (d) a cell in the pollen grain in which the sperms are formed.

Description : In gymnosperms, the pollen chamber represents (a) a cavity in the ovule in which pollen grains are stored after pollination (b) an opening in the megagametophyte through which the pollen tube approaches the ... pollen grains develop (d) a cell in the pollen grain in which the sperms are formed.

Last Answer : (c) the microsporangium in which pollen grains develop

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 .

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.

Which spore is on a club and results from the fusion of two nuclei from different strains ofthesame fungi? A- Ascospore B- Basidiospore C- Blastospore D- Conidiospore

Description : Which spore is on a club and results from the fusion of two nuclei from different strains ofthesame fungi? A- Ascospore B- Basidiospore C- Blastospore D- Conidiospore

Last Answer : Basidiospore

What happens at fertilization after gametes experiance meiosis?

Description : What happens at fertilization after gametes experiance meiosis?

Last Answer : The development of a new progeny organism is then initiated by the fusion of these gametes at fertilization

Genes are not found in pairs - (1) in body cells (2) in ovary after fertilization (3) in gametes (4) in zygotes

Description : Genes are not found in pairs - (1) in body cells (2) in ovary after fertilization (3) in gametes (4) in zygotes

Last Answer : (3) in gametes Explanation: Genes are a part of the chromosome and are found in pairs in somatic cells. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved.

Genes are not found in pairs (1) in body cells (2) in ovary after fertilization (3) in gametes (4) in zygotes

Description : Genes are not found in pairs (1) in body cells (2) in ovary after fertilization (3) in gametes (4) in zygotes

Last Answer : in gametes

Development of Sporophyte from gametophyte tissue without fusion of gametes is: (a) Apospory (b) Apogamy (c) Apomixis (d) Parthenogenesis

Description : Development of Sporophyte from gametophyte tissue without fusion of gametes is: (a) Apospory (b) Apogamy (c) Apomixis (d) Parthenogenesis

Last Answer : Ans. ((b))

How are male and female gametes production different?

Description : How are male and female gametes production different?

Last Answer : In males 4 sperms are produced from one cell while in female 1egg and 3 polar bodies are produced in mammals .

(3) two light nuclei combine to form a heavy nucleus Explanation: Nuclear fusion is the process of making a single heavy nucleus (part of an atom) from two lighter nuclei. The difference in mass between the products and reactants is manifested as the release of large amounts of energy. Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.

Description : (3) two light nuclei combine to form a heavy nucleus Explanation: Nuclear fusion is the process of making a single heavy nucleus (part of an atom) from two lighter nuclei. The difference in mass ... . Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.

Last Answer : Helium is added to the oxygen supply of deep sea divers because it is - (1) less poisonous than nitrogen (2) (2) Lighter than nitrogen (3) Readily miscible with oxygen (4) less soluble in blood than nitrogen at high pressure

The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - (1) Nuclear fusion (2) Nuclear fission (3) Nuclear reaction (4) Fast breeding

Description : The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - (1) Nuclear fusion (2) Nuclear fission (3) Nuclear reaction (4) Fast breeding

Last Answer : (2) Nuclear fission Explanation: Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.

The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - (1) Nuclear fusion (2) Nuclear fission (3) Nuclear reaction (4) Fast breeding

Description : The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - (1) Nuclear fusion (2) Nuclear fission (3) Nuclear reaction (4) Fast breeding

Last Answer : (2) Nuclear fission Explanation: Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.

In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ? A. Chemical Reaction B. Nuclear reaction C. Fission nuclear reaction D. Fusion nuclear reaction (Answer) E. None of these

Description : In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear ... reaction C. Fission nuclear reaction D. Fusion nuclear reaction (Answer) E. None of these

Last Answer : D. Fusion nuclear reaction (Answer)

Which one of the following takes place during a nuclear fusion? (1) a heavy nucleus bombarded by neutrons breaks up (2) a heavy nucleus breaks up spontaneously (3) two light nuclei combine to form a heavy nucleus (4) a light nucleus breaks up spontaneously

Description : Which one of the following takes place during a nuclear fusion? (1) a heavy nucleus bombarded by neutrons breaks up (2) a heavy nucleus breaks up spontaneously (3) two light nuclei combine to form a heavy nucleus (4) a light nucleus breaks up spontaneously

Last Answer : two light nuclei combine to form a heavy nucleus

Statement-1 : Energy is released in the nuclear fusion of hydrogen nuclei to form helium nuclei Because Statement-2 : Binding energy per nucleon of he

Description : Statement-1 : Energy is released in the nuclear fusion of hydrogen nuclei to form helium nuclei Because Statement-2 : Binding energy per nucleon of he

Last Answer : Statement-1 : Energy is released in the nuclear fusion of hydrogen nuclei to form helium nuclei Because ... Statement-2 is false, statement-2 is true

What refers to the strong repulsion between the positively charged nuclei which makes fusion reaction difficult to attain?  A. Atomic repulsion  B. Nuclear repulsion  C. Coulomb repulsion  D. Charge repulsion

Description : What refers to the strong repulsion between the positively charged nuclei which makes fusion reaction difficult to attain?  A. Atomic repulsion  B. Nuclear repulsion  C. Coulomb repulsion  D. Charge repulsion

Last Answer : Coulomb repulsion

Conifers differ from grasses in the (a) formation of endosperm before fertilization (b) production of seeds from ovules (c) lack of xylem tracheids (d) absence of pollen tubes.

Description : Conifers differ from grasses in the (a) formation of endosperm before fertilization (b) production of seeds from ovules (c) lack of xylem tracheids (d) absence of pollen tubes.

Last Answer : (a) formation of endosperm before fertilization

The transfer of pollen grains from anther to stigma is called; a) Fertilization b) pollination c) Microsporogenesis d) Polyembryony

Description : The transfer of pollen grains from anther to stigma is called; a) Fertilization b) pollination c) Microsporogenesis d) Polyembryony

Last Answer : Ans. b) Pollination

Geitonogamy involves:a)Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.b)Fertilization of a flower by the pollen from another flower of the same plant.c)Fertilization of a flower bythe pollen from the same flower.d)Fertilization of a flower by the pollen from a flower of another plant in the same population

Description : Geitonogamy involves:a)Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.b)Fertilization of a flower by the pollen from another flower of the same ... flower by the pollen from a flower of another plant in the same population

Last Answer : b)Fertilization of a flower by the pollen from another flower of the same plant

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

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.