18 Questions
What type of tissue makes the plant hard and stiff?
Sclerenchyma
What is the primary function of collenchyma tissue in plants?
Providing flexibility
In the context of plant tissues, where is parenchyma commonly found?
In various parts of the plant
What is the process of supplying water to crop plants through human efforts known as?
Irrigation
Which is one of the most common sources of irrigation mentioned in the text?
Canals
What distinguishes mixtures from pure substances according to the text?
Mixtures contain multiple types of pure substances
Which phenomenon explains the visibility of a beam of light passing through a colloidal solution?
Tyndall effect
Why does a beam of light passing through sodium chloride solution not show the Tyndall effect?
Sodium chloride particles are too small to scatter light
In agricultural irrigation, what is the primary purpose of applying controlled amounts of water to land?
To assist in crop production
What type of tissue helps aquatic plants to float?
Aerenchyma
Which statement about sources of irrigation is most accurate?
Tube wells are the most common source of irrigation
Why does mist in a dense forest canopy exhibit the Tyndall effect?
Dispersion of colloidal water droplets in mist
What is the characteristic of a body that starts from rest according to the text?
Positive acceleration
Which revolution in India is responsible for increasing fish production?
Blue revolution
What chemical is deposited on the wall of sclerenchyma tissues according to the text?
Lignin
Who discovered free-living cells of algae Spirogyra for the first time with an improved microscope in 1674?
A.V. Leeuwenhoek
How many atoms are there in a phosphate ion according to the text?
5
Which tissues are classified as simple permanent tissues in plants according to the text?
Collenchyma, parenchyma, sclerenchyma
Study Notes
Plant Tissues
- Parenchyma is the most common simple permanent tissue, consisting of relatively unspecialized cells with thin cell walls that are living cells.
- Collenchyma allows bending of various parts of the plant, such as tendrils and stems of climbers, without breaking.
- Sclerenchyma tissue makes the plant hard and stiff, and is found in stems, around vascular bundles, in the veins of leaves, and in the hard covering of seeds and nuts.
- Sclerenchyma cells are long and narrow, with thickened walls due to lignin.
Irrigation
- Irrigation is the process of supplying water to crop plants through human efforts using canals, wells, reservoirs, and tube wells.
- The most common source of irrigation is tube wells.
Mixtures and Solutions
- Mixtures are constituted by more than one kind of pure form of matter.
- Sodium chloride is a pure substance, not a mixture.
Tyndall Effect
- The Tyndall effect is the scattering of light by colloidal particles, making the path of a beam of light visible.
- Examples of the Tyndall effect include the visibility of sunlight passing through the canopy of a dense forest and the scattering of light by particles of dust or smoke in a dark room.
Other
- Apical and intercalary meristems are not permanent tissues.
- Aerenchyma helps aquatic plants to float, but does not provide mechanical support.
- Lignin is the chemical deposited on the walls of sclerenchyma cells, making them impervious to water and air.
Test your knowledge on plant tissues including parenchyma, collenchyma, and sclerenchyma. Learn about the characteristics and functions of these different types of simple permanent tissues found in plants.
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