Biology
Plant Transport and Physiology
1,834 Questions
Access a comprehensive set of questions on plant transport mechanisms and physiological adaptations. Topics include water movement, translocation of food, and plant responses to external stimuli. These biology questions are essential for medical entrance exams and other science competitive tests.
Xylem and phloem transportTranspiration and evaporationPlant adaptationsGeotropic and phototropic responsesWater absorption by rootsRespiration in roots
Plant Transport and Physiology Questions
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Only a
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Only a and b
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Only b
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Only b and c
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Only c
B
Correct answer
Explanation
This is the correct option. Chlamydomonas, a unicellular organism, and Spirogyra, a simple multicellular plant, use the process of diffusion for the transportation of materials.
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stomata
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xylem
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phloem
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root hair
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buds
A
Correct answer
Explanation
This is the correct option. The process of transpiration occurs in plants through stomata by the process of diffusion.
C
Correct answer
Explanation
Stomata are tiny pores found on the surface of leaves that allow for the exchange of gases such as carbon dioxide and oxygen during photosynthesis and respiration.
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Phloem
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Xylem
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Epidermis
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Epithelial
A
Correct answer
Explanation
Phloem translocates prepared food from leaves to the storage organs and growing parts of the plants.
B
Correct answer
Explanation
The main function of the xylem is to carry water and mineral salts upward from the root to different parts of shoots.
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lignin
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cutin
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pectin
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suberin
B
Correct answer
Explanation
Cutin deposition reduces the rate of surface transpiration.
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lignin
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suberin
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cutin
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pectin
B
Correct answer
Explanation
The cell wall of cork contains a fatty acid called suberin which makes it impermeable.
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Cell wall is impermeable.
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Cell wall is selectively permeable.
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Cell wall is semi-permeable.
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Cell wall is permeable.
D
Correct answer
Explanation
Cell wall is not permeable to macromolecules like starch.
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The jute plant is normally harvested when it is in the flowering stage.
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The stems of the harvested jute plants are immersed in water.
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The stem, root and fibres are separated by hand.
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All of the above
D
Correct answer
Explanation
All of the above options are correct.
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Diffusion pressure
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Osmotic pressure
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Partial pressure
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Gravitational pull
B
Correct answer
Explanation
Sucrose is transferred into the phloem tissue using energy from ATP. This increases the osmotic pressure of the tissue, causing water to move into it. This pressure moves the material in the phloem to tissues which have less pressure.
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In the shade
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In the dim light
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Under the fan
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Covered with a polythene
C
Correct answer
Explanation
Water absorption through roots can be increased by keeping the plants under the fan.
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Xylem
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Phloem
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Stomata
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Root hair
A
Correct answer
Explanation
Water is transported xylem in plants whereas food is transported through phloem. Stomata are small pores on leaves through which water is lost in the form of water vapor. Root hairs are present on the roots and they help in water absorption from soil.
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Soil
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Root hairs
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Air spaces
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None of the above
B
Correct answer
Explanation
The root hair increase the surface area of the root for the absorption of water and mineral nutrients dissolved in water. The root hair is in contact with the water present between the soil particles.
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Opens
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Closes
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Open or closes
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No effect
A
Correct answer
Explanation
Opening and closure of the stomata pore is mediated by changes in the turgor pressure of the two guard cells. The turgor pressure of guard cells is controlled by movements of large quantities of ions and sugars into and out of the guard cells
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root pressure
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transpiration
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respiration
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turgidity of cells
A
Correct answer
Explanation
Root pressure pulls the water level up and excess water absorbed during water logged condition along with some salt, is given out through hydathodes in leaves which is guttation.