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[A]: The secondary pholem consititutes a...

[A]: The secondary pholem consititutes a less poriment part of the tree trunk than the secondry xylem
[R] : The amount of Phloem produced by the cambium is smaller than that of seconday

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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A
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Amount of secondary xylem is more than secondary phloem because

The existence of negatively charged particle in an atom was shown by J.J. Thomson as a result of the studies of the passage of electricity through gases at extremely low pressure known as discharge tube experiments. When a high voltage of the order of 10,000 volts or more was impressed across the electrodes, some sort of invisible rays moved from the negative electrode to the positive electrode these rays are called as cathode rays. Cathode rays travel in straight path in absence of electrical and magnetic field . Cathode rays consist of material part and charged particles? Cathode rays produce X-rays and light is emitted when they strike on ZnS screen. Cathode rays penetrate through thin sheets of aluminium and other metals . They affect the photogenic plate and passes heating effect when they strike on metal foil. The raito of charge to mass i.e charge/mass is same for all the cathode rays irrespective of the gas used in the tube. The existence of positively charged particle in an atom was shown be E. Goldstein. He repeated the same discharge tube experiments by using a perforated cathode. It was observed that when a high potential difference was applied between the electrodes, not only cathode rays were produced but also a new type of rays were produced simultaneoulsy from anode moving towards cathode and passes through the holes or canal of the cathode. These termed as canal rays or anode rays. These rays travel in straight lines and consists of positively charged particles. These rays have kinetic energy and produces heating effect also. The e/m ratio of these rays is smaller than that of electrons. Unlike cathode rays, their e/m value is dependent upon the nature of the gas taken in the tube. These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. They can produce physical and chemical changes and are capable to produce ionisation in gases. Which is not true with respect to cathode rays?

The existence of negatively charged particle in an atom was shown by J.J. Thomson as a result of the studies of the passage of electricity through gases at extremely low pressure known as discharge tube experiments. When a high voltage of the order of 10,000 volts or more was impressed across the electrodes, some sort of invisible rays moved from the negative electrode to the positive electrode these rays are called as cathode rays. Cathode rays travel in straight path in absence of electrical and magnetic field . Cathode rays consist of material part and charged particles? Cathode rays produce X-rays and light is emitted when they strike on ZnS screen. Cathode rays penetrate through thin sheets of aluminium and other metals . They affect the photogenic plate and passes heating effect when they strike on metal foil. The raito of charge to mass i.e charge/mass is same for all the cathode rays irrespective of the gas used in the tube. The existence of positively charged particle in an atom was shown be E. Goldstein. He repeated the same discharge tube experiments by using a perforated cathode. It was observed that when a high potential difference was applied between the electrodes, not only cathode rays were produced but also a new type of rays were produced simultaneoulsy from anode moving towards cathode and passes through the holes or canal of the cathode. These termed as canal rays or anode rays. These rays travel in straight lines and consists of positively charged particles. These rays have kinetic energy and produces heating effect also. The e/m ratio of these rays is smaller than that of electrons. Unlike cathode rays, their e/m value is dependent upon the nature of the gas taken in the tube. These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. They can produce physical and chemical changes and are capable to produce ionisation in gases. For cathode rays the value of e/m:

The existence of negatively charged particle in an atom was shown by J.J. Thomson as a result of the studies of the passage of electricity through gases at extremely low pressure known as discharge tube experiments. When a high voltage of the order of 10,000 volts or more was impressed across the electrodes, some sort of invisible rays moved from the negative electrode to the positive electrode these rays are called as cathode rays. Cathode rays travel in straight path in absence of electrical and magnetic field . Cathode rays consist of material part and charged particles? Cathode rays produce X-rays and light is emitted when they strike on ZnS screen. Cathode rays penetrate through thin sheets of aluminium and other metals . They affect the photogenic plate and passes heating effect when they strike on metal foil. The raito of charge to mass i.e charge/mass is same for all the cathode rays irrespective of the gas used in the tube. The existence of positively charged particle in an atom was shown be E. Goldstein. He repeated the same discharge tube experiments by using a perforated cathode. It was observed that when a high potential difference was applied between the electrodes, not only cathode rays were produced but also a new type of rays were produced simultaneoulsy from anode moving towards cathode and passes through the holes or canal of the cathode. These termed as canal rays or anode rays. These rays travel in straight lines and consists of positively charged particles. These rays have kinetic energy and produces heating effect also. The e/m ratio of these rays is smaller than that of electrons. Unlike cathode rays, their e/m value is dependent upon the nature of the gas taken in the tube. These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. They can produce physical and chemical changes and are capable to produce ionisation in gases. Select the incorrect statement.

[A] : The narrow band of meristemetic tissue present between pholem and xylem is called cambium [R] : In dicotyleyledonous steam a part of the procambium remain maristemetic which is called cambium

Consider two conducting spheres of radii R_(1) and R_(2) with R_(1) gt R_(2) . If the two are at the same potential, the larger sphere has more charge than the smaller sphere. State whetehr the charge density of the smaller sphere is more or less than that of the larger oe.

TRUEMAN BIOLOGY-Plant Morphology & Reproduction -ASSERTION AND REASON
  1. Assertion. In apomixis , plants of new genetic sequence are produced. ...

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  2. Assertion : In collateral vascular bundles phloem is situated toward ...

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  3. [A]: The secondary pholem consititutes a less poriment part of the tre...

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  4. [A] : The narrow band of meristemetic tissue present between pholem an...

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  5. [A]: The inner most distinict layer of the cortex is called endomermi...

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  6. [A]: Gramineoos type of stomata are found in Gramineae and Cyperaceae....

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  7. [A]: lntercellular spaces are found in mer-isematic cells (R]: The m...

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  8. [A]: Monocot stem has collateral open vascu- lar bundle. [R]: Open ...

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  9. [A]: Root system in hydrophytes is poorly de- veloped. [R]: The con...

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  10. [A]: Aerenchyma is a characteristic of litho- phyte. [R]: It is a sp...

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  11. [A]: Protostele is most simple primitive type of stele. [R]: Accordi...

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  12. [A]: Rubber is obtained from the latex of Hevea brasiliensis. [R]: B...

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  13. [A]: No fibres are found in plants. [R]: Xylem vessels are absent ...

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  14. [A]: Sclerenchyma cells are rarely found in plants. [R]: Sclerencym...

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  15. [A]: Hanstein's dermatogen is not eqyivalent to Haberlandt's Protoderm...

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  16. [A]: Trichomes may occur on all parts of a plant. [R]: Trichomes ei...

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  17. [A]: The vascular cambium is absent in monocots. [R]: The monocots ...

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  18. [A]: In the hydrophytes the Xylem is not differ- entiated into differe...

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  19. [A]: Dicot stem shows secondary growth. [R]: Tissue system is not d...

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  20. given below are assertion and reson. Point out if Assertion . In woo...

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