After penetrating stigmatic and styler tissues, pollen tube usually grow down towards egg because

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1.Sexual Reproduction in Flowering Plants

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After penetrating stigmatic and styler tissues, the pollen tube usually grow down towards the egg because

The egg cell attracts the pollen tube as they have dissimilar electric charge

The filiform apparatus of synergids is believed to attract the pollen tube

It has no other passage to follow

It grows under control of nucleus

Solution

(b) In porogomy, filiform apparatus of synergids secretes, some chemotropically active substances, which direct the pollen tube towards micropyle of ovule.

Standard 12

Biology

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

easy

(NEET-2018)

Identify $A$ to $E$ in the following diagram

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How many meiotic divisions are necessary to produce $100$ pollen grains

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(AIPMT-1995)

$A$ – Only some cells of the sporogenous tissue is capable of giving rise to microspore tetrad.

$R$- The microspores are arranged in a cluster of four cells – the microscopic tetrad.

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Proximal end of the filament of stamen is attached to the

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(NEET-2016)

After penetrating stigmatic and styler tissues, the pollen tube usually grow down towards the egg because

Solution

Similar Questions

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

Identify $A$ to $E$ in the following diagram

How many meiotic divisions are necessary to produce $100$ pollen grains

$A$ – Only some cells of the sporogenous tissue is capable of giving rise to microspore tetrad. $R$- The microspores are arranged in a cluster of four cells – the microscopic tetrad.

Proximal end of the filament of stamen is attached to the

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$A$ – Only some cells of the sporogenous tissue is capable of giving rise to microspore tetrad.

$R$- The microspores are arranged in a cluster of four cells – the microscopic tetrad.