262551
In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
1 75
2 100
3 25
4 50
Explanation:
Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus 25 microspore mother cells are required to produce 100 pollen grains
AIPMT-1995
Sexual Reproduction in Flowering Plants
262553
If a stock has \(2 n=48\) and scion microspore mother cell has \(2 n=24\), then root cell and the microspores will have chromosomes respectively.
1 12,48
2 48,12
3 24,12
4 24,96
Explanation:
In angiosperms the root cells divide by the process of mitosis where as the microspore cells divide by the process of meiosis. The number of chromosomes in daughter cells produced after mitosis in root cells will be same as the parent cell, whereas the number of chromosomes in daughter cells produced after meiosis in microspore mother cell (MMC) be one half. Then the number of root chromosome will be 48 and 12 respectively.
AIIMS-2011
Sexual Reproduction in Flowering Plants
262554
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
1 laser beam stimulates pollen germination and pollen tube growth
2 the laser beam does not damage the region from which pollen tube emerges
3 the contents of killed generative cell permits germination and pollen tube growth
4 The vegetative cell has not been damaged
Explanation:
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube becauseThe vegetative cell has not been damaged.
Manipal-2015 / AIIMS-2008 / JPMER-1998
Sexual Reproduction in Flowering Plants
262556
Xenia and metaxenia terms are related with
1 Pollen culture
2 Xylem and phloem
3 Only endosperm
4 Pollen and endosperm.
Explanation:
Term metaxenia was given by Swingle in date palm. The direct or indirect effect of forgen pollen grains on the character of endosperm is called the Xenia and effect of forgen pollen grains of the characters of seed and fruits is called the metaxenia.
262551
In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
1 75
2 100
3 25
4 50
Explanation:
Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus 25 microspore mother cells are required to produce 100 pollen grains
AIPMT-1995
Sexual Reproduction in Flowering Plants
262553
If a stock has \(2 n=48\) and scion microspore mother cell has \(2 n=24\), then root cell and the microspores will have chromosomes respectively.
1 12,48
2 48,12
3 24,12
4 24,96
Explanation:
In angiosperms the root cells divide by the process of mitosis where as the microspore cells divide by the process of meiosis. The number of chromosomes in daughter cells produced after mitosis in root cells will be same as the parent cell, whereas the number of chromosomes in daughter cells produced after meiosis in microspore mother cell (MMC) be one half. Then the number of root chromosome will be 48 and 12 respectively.
AIIMS-2011
Sexual Reproduction in Flowering Plants
262554
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
1 laser beam stimulates pollen germination and pollen tube growth
2 the laser beam does not damage the region from which pollen tube emerges
3 the contents of killed generative cell permits germination and pollen tube growth
4 The vegetative cell has not been damaged
Explanation:
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube becauseThe vegetative cell has not been damaged.
Manipal-2015 / AIIMS-2008 / JPMER-1998
Sexual Reproduction in Flowering Plants
262556
Xenia and metaxenia terms are related with
1 Pollen culture
2 Xylem and phloem
3 Only endosperm
4 Pollen and endosperm.
Explanation:
Term metaxenia was given by Swingle in date palm. The direct or indirect effect of forgen pollen grains on the character of endosperm is called the Xenia and effect of forgen pollen grains of the characters of seed and fruits is called the metaxenia.
262551
In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
1 75
2 100
3 25
4 50
Explanation:
Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus 25 microspore mother cells are required to produce 100 pollen grains
AIPMT-1995
Sexual Reproduction in Flowering Plants
262553
If a stock has \(2 n=48\) and scion microspore mother cell has \(2 n=24\), then root cell and the microspores will have chromosomes respectively.
1 12,48
2 48,12
3 24,12
4 24,96
Explanation:
In angiosperms the root cells divide by the process of mitosis where as the microspore cells divide by the process of meiosis. The number of chromosomes in daughter cells produced after mitosis in root cells will be same as the parent cell, whereas the number of chromosomes in daughter cells produced after meiosis in microspore mother cell (MMC) be one half. Then the number of root chromosome will be 48 and 12 respectively.
AIIMS-2011
Sexual Reproduction in Flowering Plants
262554
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
1 laser beam stimulates pollen germination and pollen tube growth
2 the laser beam does not damage the region from which pollen tube emerges
3 the contents of killed generative cell permits germination and pollen tube growth
4 The vegetative cell has not been damaged
Explanation:
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube becauseThe vegetative cell has not been damaged.
Manipal-2015 / AIIMS-2008 / JPMER-1998
Sexual Reproduction in Flowering Plants
262556
Xenia and metaxenia terms are related with
1 Pollen culture
2 Xylem and phloem
3 Only endosperm
4 Pollen and endosperm.
Explanation:
Term metaxenia was given by Swingle in date palm. The direct or indirect effect of forgen pollen grains on the character of endosperm is called the Xenia and effect of forgen pollen grains of the characters of seed and fruits is called the metaxenia.
262551
In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
1 75
2 100
3 25
4 50
Explanation:
Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus 25 microspore mother cells are required to produce 100 pollen grains
AIPMT-1995
Sexual Reproduction in Flowering Plants
262553
If a stock has \(2 n=48\) and scion microspore mother cell has \(2 n=24\), then root cell and the microspores will have chromosomes respectively.
1 12,48
2 48,12
3 24,12
4 24,96
Explanation:
In angiosperms the root cells divide by the process of mitosis where as the microspore cells divide by the process of meiosis. The number of chromosomes in daughter cells produced after mitosis in root cells will be same as the parent cell, whereas the number of chromosomes in daughter cells produced after meiosis in microspore mother cell (MMC) be one half. Then the number of root chromosome will be 48 and 12 respectively.
AIIMS-2011
Sexual Reproduction in Flowering Plants
262554
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
1 laser beam stimulates pollen germination and pollen tube growth
2 the laser beam does not damage the region from which pollen tube emerges
3 the contents of killed generative cell permits germination and pollen tube growth
4 The vegetative cell has not been damaged
Explanation:
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube becauseThe vegetative cell has not been damaged.
Manipal-2015 / AIIMS-2008 / JPMER-1998
Sexual Reproduction in Flowering Plants
262556
Xenia and metaxenia terms are related with
1 Pollen culture
2 Xylem and phloem
3 Only endosperm
4 Pollen and endosperm.
Explanation:
Term metaxenia was given by Swingle in date palm. The direct or indirect effect of forgen pollen grains on the character of endosperm is called the Xenia and effect of forgen pollen grains of the characters of seed and fruits is called the metaxenia.
