Failure of a viable pollen to grow down the style of the flower of the same variety is called ___________: a. Self sterility b. Self incompatibility c. Self unfruitfulness d. Sterility

Failure of a viable pollen to grow down the style of the flower of the same variety is
called ___________:
a. Self sterility
b. Self incompatibility
c. Self unfruitfulness
d. Sterility
by

1 Answer

Answer :

Self incompatibility
by

Related questions

Self fertility refers to the ability of a variety to produce fruits with viable ___: a. Pollens b. Seeds c. Ovules d. Ovaries

Description : Self fertility refers to the ability of a variety to produce fruits with viable ___: a. Pollens b. Seeds c. Ovules d. Ovaries

Last Answer : Seeds

In pollen development Gametocides induces a problem of: a. Sterility b. Viability c. Fertility d. Mobility

Description : In pollen development Gametocides induces a problem of: a. Sterility b. Viability c. Fertility d. Mobility

Last Answer : Sterility

Male sterility promotes: a. Autogamy b. Allogamy c. Homogamy d. Chasmogamy

Description : Male sterility promotes: a. Autogamy b. Allogamy c. Homogamy d. Chasmogamy

Last Answer : Chasmogamy

Inability of a hybrid to produce viable offsprings is known as a. Hybrid b. sterility c. Hybrid inviability d. Hybrid breakdown e. All of these

Description : Inability of a hybrid to produce viable offsprings is known as a. Hybrid b. sterility c. Hybrid inviability d. Hybrid breakdown e. All of these

Last Answer : a. Hybrid

Failure of a bulb to produce a marketable flower following floral initiation is: a. Disbudding b. Flower blasting c. Damping off d. Dieback

Description : Failure of a bulb to produce a marketable flower following floral initiation is: a. Disbudding b. Flower blasting c. Damping off d. Dieback

Last Answer : Flower blasting

Seed of strawberry fruit is: a. Achene b. True seed c. Viable seed d. Aborted seed

Description : Seed of strawberry fruit is: a. Achene b. True seed c. Viable seed d. Aborted seed

Last Answer : Achene

Which of the following statements is not correct? (a) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (b) Some reptiles have also been reported as pollinators in some plant species. (c) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. (d) Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.

Description : Which of the following statements is not correct? (a) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (b) ... Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.

Last Answer : (c) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

When pollen sterility is caused by cytoplasmic genes

Description : When pollen sterility is caused by cytoplasmic genes

Last Answer : Ans. Cytoplasmic Male Sterility (CMS)

Metaxenia is the impact of a. Pollen on seed b. Pollen on fruit c. Pollen on ovule d. Pollen on ovary

Description : Metaxenia is the impact of a. Pollen on seed b. Pollen on fruit c. Pollen on ovule d. Pollen on ovary

Last Answer : Pollen on ovule

The part of the flower that is adapted to catch pollen is the: a) stigma b) style c) anther d) ovule

Description : The part of the flower that is adapted to catch pollen is the: a) stigma b) style c) anther d) ovule

Last Answer : ANSWER: A -- STIGMA

Sterility mosaic and wilt resistant variety of pigeonpea

Description : Sterility mosaic and wilt resistant variety of pigeonpea

Last Answer : Ans.Amar, Narendra Arhar 1, Azad

Which one of the following statements is wrong? (a) When pollen is shed at two-celled stage, double fertilisation does not take place. (b) Vegetative cell is larger than generative cell. (c) Pollen grains in some plants remain viable for months. (d) Intine is made up of cellulose and pectin.

Description : Which one of the following statements is wrong? (a) When pollen is shed at two-celled stage, double fertilisation does not take place. (b) Vegetative cell is larger than generative cell. (c) Pollen grains in some plants remain viable for months. (d) Intine is made up of cellulose and pectin.

Last Answer : (a) When pollen is shed at two-celled stage, double fertilisation does not take place.

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

Dacca is a selected variety of: a. Herb b. Shrub c. Turfgrass d. None of these

Description : Dacca is a selected variety of: a. Herb b. Shrub c. Turfgrass d. None of these

Last Answer : Turfgrass

“Thalsa” is a variety of potato very suitable for the region of: a. Peshawar b. Tandojam c. Mir Pur Khas d. Sahiwal

Description : “Thalsa” is a variety of potato very suitable for the region of: a. Peshawar b. Tandojam c. Mir Pur Khas d. Sahiwal

Last Answer : Peshawar

Dhaki variety of date palm was originated in: a. Sindh b. NWFP c. Balochistan d. Punjab

Description : Dhaki variety of date palm was originated in: a. Sindh b. NWFP c. Balochistan d. Punjab

Last Answer : NWFP

__________ variety of apple is reported to perform well at lower altitudes. a. Enna b. Amri c. Diana d. Golden Delicious

Description : __________ variety of apple is reported to perform well at lower altitudes. a. Enna b. Amri c. Diana d. Golden Delicious

Last Answer : Enna

The variety originated from a cross of King X Willow leaf is: a. Clementine b. Fair child c. Feutrell’s early d. Kinnow

Description : The variety originated from a cross of King X Willow leaf is: a. Clementine b. Fair child c. Feutrell’s early d. Kinnow

Last Answer : Kinnow

Sensation is the variety of: a. Sweet orange b. Grape fruit c. Mandarin d. Mango

Description : Sensation is the variety of: a. Sweet orange b. Grape fruit c. Mandarin d. Mango

Last Answer : Mango

The foster is variety of : a. Mandarin b. Sweet orange c. Pummelos d. Grape fruit

Description : The foster is variety of : a. Mandarin b. Sweet orange c. Pummelos d. Grape fruit

Last Answer : Grape fruit

Shamber is variety of Grape fruit in which pulp is; a. Pigmented and seedless b. White and seedless c. Pigmented but seeded d. White and seeded

Description : Shamber is variety of Grape fruit in which pulp is; a. Pigmented and seedless b. White and seedless c. Pigmented but seeded d. White and seeded

Last Answer : Pigmented and seedless

Gross Michel is high yielding variety of: a. Papaya b. Grapes c. Banana d. Litchi

Description : Gross Michel is high yielding variety of: a. Papaya b. Grapes c. Banana d. Litchi

Last Answer : Banana

Pruning is carried out in date palm variety: a. Deglet Noor b. Hillawi c. Khudrawi d. Ajwa

Description : Pruning is carried out in date palm variety: a. Deglet Noor b. Hillawi c. Khudrawi d. Ajwa

Last Answer : Deglet Noor

Seedless date palm variety is: a. Hassaku b. Hillai c. Ajwa d. None

Description : Seedless date palm variety is: a. Hassaku b. Hillai c. Ajwa d. None

Last Answer : Hassaku

Pruning is a regular practice in date palm variety a. Hillawi b. Khudrawi c. Deglet Noor d. Hillini

Description : Pruning is a regular practice in date palm variety a. Hillawi b. Khudrawi c. Deglet Noor d. Hillini

Last Answer : Deglet Noor

Color of carrot depends upon a. Age b. Variety c. Season d. All of these

Description : Color of carrot depends upon a. Age b. Variety c. Season d. All of these

Last Answer : All of these

Cultivar means a. Some cultivated variety b. Discarded variety c. Rejected variety d. Approved variety

Description : Cultivar means a. Some cultivated variety b. Discarded variety c. Rejected variety d. Approved variety

Last Answer : Some cultivated variety

The commercial variety of watermelon is: a. Sugar baby b. Red beauty c. Red king d. Sugary

Description : The commercial variety of watermelon is: a. Sugar baby b. Red beauty c. Red king d. Sugary

Last Answer : Sugar baby

What is self-incompatibility? -Biology

Description : What is self-incompatibility? -Biology

Last Answer : answer:

The renewal of NO3 involves release of ___________ from organic fraction of the soil and its rapid nitrification: a. NO2 b. NH4 c. N d. NO

Description : The renewal of NO3 involves release of ___________ from organic fraction of the soil and its rapid nitrification: a. NO2 b. NH4 c. N d. NO

Last Answer : NH4

Apple and pear form their flowers buds in ___________: a. May-June b. July-August c. September-October d. November-December

Description : Apple and pear form their flowers buds in ___________: a. May-June b. July-August c. September-October d. November-December

Last Answer : July-August

Rate of bud development is ___________ upto winter season : a. Slow b. Rapid c. Medium d. Constant

Description : Rate of bud development is ___________ upto winter season : a. Slow b. Rapid c. Medium d. Constant

Last Answer : Rapid

Viscosity of the cytoplasm increases when temperature is ___________: a. Low b. Medium c. High d. Very High

Description : Viscosity of the cytoplasm increases when temperature is ___________: a. Low b. Medium c. High d. Very High

Last Answer : High

Nitrates are absorbed at pH below ___________: a. 5 b. 6 c. 7 d. 8

Description : Nitrates are absorbed at pH below ___________: a. 5 b. 6 c. 7 d. 8

Last Answer : 5

Cross pollinated in apple generally produce a. Bad results than self pollinated b. Better results than self pollinated c. Same results as self pollinated d. Non of these

Description : Cross pollinated in apple generally produce a. Bad results than self pollinated b. Better results than self pollinated c. Same results as self pollinated d. Non of these

Last Answer : Better results than self pollinated

Japanese style of floral arrangement is known as: a. Ikenobo b. Yen c. Ikebana d. Ying

Description : Japanese style of floral arrangement is known as: a. Ikenobo b. Yen c. Ikebana d. Ying

Last Answer : Ikebana

Parienth is the fnion of a. Calyx and Corolla b. Pedicel and Thalamus c. Stamen and Stigma d. Style and Ovary

Description : Parienth is the fnion of a. Calyx and Corolla b. Pedicel and Thalamus c. Stamen and Stigma d. Style and Ovary

Last Answer : Calyx and Corolla

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result (a) there is high degree of sterility (b) one can conclude that the plant is apomictic (c) self fertilization is prevented (d) there is no change in success rate of fertilization.

Description : In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result (a) there is high degree of sterility (b) one can conclude that the plant is apomictic (c) self fertilization is prevented (d) there is no change in success rate of fertilization.

Last Answer : (c) self fertilization is prevented

Define self sterility. Give an example

Description : Define self sterility. Give an example

Last Answer : Ans: It is failure of germination of pollen grains on the stigma of the same flower. Ex: Orchids, Passiflorea, Abutilon

A flower which has all the usual parts sepals, petals, stamens and carpel is called a. hermaphrodite b. Complete c. Pistilate d. Incomplete

Description : A flower which has all the usual parts sepals, petals, stamens and carpel is called a. hermaphrodite b. Complete c. Pistilate d. Incomplete

Last Answer : hermaphrodite

A group of flowers on an axis is called a. Solitary axillary flower b. Solitary terminal flower c. Inflorescence d. Modified flower

Description : A group of flowers on an axis is called a. Solitary axillary flower b. Solitary terminal flower c. Inflorescence d. Modified flower

Last Answer : Solitary axillary flower

Special leaf which bears a flower or cluster of flowers in its axils is called a. Bracts b. Compound leaf c. Simple leaf d. Non of these

Description : Special leaf which bears a flower or cluster of flowers in its axils is called a. Bracts b. Compound leaf c. Simple leaf d. Non of these

Last Answer : Bracts

The stamens are the male organs of flower which are also called a. Pistil b. Gynoecium c. Androecium d. Carpel

Description : The stamens are the male organs of flower which are also called a. Pistil b. Gynoecium c. Androecium d. Carpel

Last Answer : Androecium

Ripened ovary is called as: a. Flower b. Seed c. Fruit d. Embryo

Description : Ripened ovary is called as: a. Flower b. Seed c. Fruit d. Embryo

Last Answer : Fruit

Flower of grapes is technically called as: a. Umbel b. Recemose c. Clyptra d. None

Description : Flower of grapes is technically called as: a. Umbel b. Recemose c. Clyptra d. None

Last Answer : Clyptra

How to make an astroturf suit and flower costumes?

Description : How to make an astroturf suit and flower costumes?

Last Answer : answer:I think that the best way might be to glue (using fabric glue) patches of astroturf to an undersuit. Sort of like sodding a yard. Because astroturf itself requires special thread to sew it together and is too think to work in a regular sewing machine.

A __________ is a woody perennial that has more than one main trunk. a. Tree b. Flower c. Shrub d. Weed

Description : A __________ is a woody perennial that has more than one main trunk. a. Tree b. Flower c. Shrub d. Weed

Last Answer : Shrub

The bract that encloses a flower cluster is a . a. Quill b. Spathe c. Spike d. Petal

Description : The bract that encloses a flower cluster is a . a. Quill b. Spathe c. Spike d. Petal

Last Answer : Spathe

Which of the following is a shade-loving flower? a. Marigold b. Snapdragon c. Chrysanthemum d. Impatiens

Description : Which of the following is a shade-loving flower? a. Marigold b. Snapdragon c. Chrysanthemum d. Impatiens

Last Answer : Impatiens

A common example of incomplete flower is: a. Apetalous flower b. Staminate flower c. Pistillate flower d. All of the above

Description : A common example of incomplete flower is: a. Apetalous flower b. Staminate flower c. Pistillate flower d. All of the above

Last Answer : All of the above