Tag: transport in plant

Questions Related to transport in plant

Water absorbed by the roots reaches the leaves and is used in producing food for the entire plant.

biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

  1. True

  2. False

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Correct Option: A
Explanation:

The leaves prepare food for the plant, using water and carbon dioxide during photosynthesis. The roots have root hair. The roots hair increase the surface area of the root for the absorption of water and mineral nutrients dissolved in the water.

Which of the following is a food synthesising tissue?

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Phloem

  2. Sclerenchyma

  3. Chlorenchyma

  4. Aerenchyma

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Correct Option: A
Explanation:

  • Phloem is also called as bast. 
  • These tissues in plants conduct foods made in the leaves to all other parts of the plant. 
  • Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells.
  • Hence, Phloem is a food synthesizing tissue.

So, the correct answer is 'Phloem'.

The movement of molecules in phloem is

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Unidirectional.

  2. Bidirectional.

  3. Non-directional.

  4. Sometimes unidirectional and sometimes bidirectional.

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Correct Option: B
Explanation:

Phloem is responsible for transport of food and minerals. Food synthesized in photosynthetic parts is translocated to nonphotosynthetic parts through the phloem. Phloem translocates organic substances and inorganic solutes first from leaves to all other parts of the plant and storage organs. Storage organs re-export organic nutrients to those parts which require the same as newly formed leaves and fruits i.e., it is bidirectional.

Thus, the correct answer is option B.

In plants, water is transported through

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Xylem

  2. Phloem

  3. Stomata

  4. Root hair

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Correct Option: A
Explanation:
  • Xylem functions as a conducting tissue for water and minerals from roots to the stem and leaves.
  • It also provides mechanical strength to the plant parts. It is composed of four different kinds of elements, namely, tracheids, vessels, xylem fibres, and xylem parenchyma.
  • Hence In plants, water is transported through Xylem.
  • So, the correct answer is 'Xylem'.

The number of division with the plants having vascular

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. $4$

  2. $2$

  3. $1$

  4. $3$

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Correct Option: A

Minerals are absorbed by plants:

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. In colloidal form

  2. In Ionic form

  3. In precipitated form

  4. None of these

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Correct Option: B
Explanation:

Minerals are absorbed by plants - (B) In Ionic form.


Plant absorb minerals in ionic form __
Phosphate $(HPO _4^-)$ potassium ion $(K^+)$, Nitrate $(NO _3^-)$ mineral can be absorbed by both passive and Active methods. Passive mineral absorption does not require the expenditure of metabolic energy and Active mineral absorption does require the expenditure of metabolic energy. In roots, the mineral absorption usually takes place through the meristematic region of the root tip.

Which one develops from endodermis?

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Nervous system, urinary bladder and eye

  2. Liver, connective tissue and heart

  3. Thymus , spinal cord and brain

  4. None of these

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Correct Option: D
Explanation:
  • The endodermis is the boundary between the cortex and the stele. In many seedless vascular plants, the endodermis is a distinctly visible layer of cells immediately outside the vascular cylinder (stele) in roots and shoots.
  • Hence endodermis is present in plants but not in animals.
  • So, the correct answer is 'None of these'.

In higher plants, transport of food material occurs through ______________.

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Companion cells

  2. Sieve elements

  3. Tracheids

  4. Transfusion tissue

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Correct Option: B
Explanation:

The food manufactured in the leaves is translocated upwards and downwards. And to all the parts of the plant through its phloem. The phloem conducts some other substances like amino acids. The conducting cells of the phloem are cylindrical cells known as sieve tubes. These partitions are known as sieve plates. Sieve elements are the food conducting cells of many phloem tissues. Sieve elements in angiosperms are the sieve tubes, while in gymnosperms and pteridophytes, these are sieve cells.

So, the correct answer is option B.

In plants, phloem tissues perform the function of 

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Conduction of water

  2. Conduction of food

  3. Photosynthesis

  4. Mechanical suppor

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Correct Option: B
Explanation:

In plants, phloem tissues perform the function of  conduction of food.

Phloem helps in conducting food materials. It is composed of:
• Sieve tube elements
• Companion cells
• Phloem parenchyma
• Phloem fibres
Sieve tube elements are tube-like elongated structures associated with companion cells. The end walls of sieve tube elements are perforated to form the sieve plate. Sieve tube elements are living cells containing cytoplasm and nucleus. Companion cells are parenchymatous in nature. They help in maintaining the pressure gradient in the sieve tube elements. Phloem parenchyma helps in the storage of food and is made up of long tapering cells, with a dense cytoplasm. Phloem fibres are made up of elongated sclerenchymatous cells with thick cell walls.

Leaf mesophyll is included in?

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Epidermal tissue system

  2. Ground tissue system

  3. Vascular tissue system

  4. Bark

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Correct Option: A