Tag: transport in the phloem of plants

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

Minerals are absorbed by plants:

  1. In colloidal form

  2. In Ionic form

  3. In precipitated form

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Which one develops from endodermis?

  1. Nervous system, urinary bladder and eye

  2. Liver, connective tissue and heart

  3. Thymus , spinal cord and brain

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

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

  1. Companion cells

  2. Sieve elements

  3. Tracheids

  4. Transfusion tissue
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

In plants, phloem tissues perform the function of 

  1. Conduction of water

  2. Conduction of food

  3. Photosynthesis

  4. Mechanical suppor
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Function of phloem in the plant is____________

  1. Transport of water

  2. Transport of food

  3. Photosynthesis

  4. Growth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Phloem is the vascular tissue responsible for the transport of sugars from source tissues (e.g., photosynthetic leaf cells) to sink tissues (e.g., non-photosynthetic root cells or developing flowers). 
  • Other molecules such as proteins and mRNAs are also transported throughout the plant via phloem. Phloem is composed of several cell types including sclerenchyma, parenchyma, sieve elements and companion cells. 
  • The sieve element and companion cell are found closely associated with each other in what is referred to as the sieve element/companion cell complex. One or more companion cells may be associated with a single sieve element. 

Therefore, the correct answer is option B.

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

In plants, food is transported through_____________

  1. Phloem parenchyma

  2. Xylem parenchyma

  3. Xylem

  4. Phloem
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In-plant food is transported through the phloem.

Phloem is the vascular tissue responsible for the transport of sugars from source tissues to sink tissues. Other molecules such as proteins and mRNAs are also transported throughout the plant via the phloem.

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

Food substances travel up and down through

  1. Xylem

  2. Phloem

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Xylem is a type of vascular tissue in plants that transports water and solutes from the roots to the leaves. Phloem is the vascular tissue in plants which conducts sugars and other metabolic products (food) upward and downwards from the leaves.
Thus, the correct answer is option B.

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

In autotrophs, water is transported by means of__________________

  1. Xylem

  2. Phloem

  3. Stomata

  4. Roots
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Vascular tissues make up the organs that transport water, minerals, and food throughout the plant. Vascular tissue can be divided into two functional units. Xylem transports water and minerals from root to shoot. 
  • Phloem transports nutrients (such as sugar and amino acids) from leaves and other production sites to roots, flowers, stems, and other tissues.
Multiple choice biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

Movement of food, water, etc is known as

  1. Motion

  2. Transportation

  3. Translocation

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phloem transports synthesized food from the leaves to the rest of the plant body. The transport of water, nutrients, and other substances from one part of a plant to another is called as translocation. The medium of transport in plants is water. 

So, the correct answer is option C.