Tag: transportation in plants and circulation in animals

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Questions Related to transportation in plants and circulation in animals

Multiple choice biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

Which pressure is responsible for ascent of sap?

  1. Negative hydrostatic pressure

  2. Positive hydrostatic pressure

  3. Root pressure

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In the Root Pressure, the root Xylem vessels absorb the minerals from the soil, as a result, the water potential outside the root increase and inside the root decreases so due to water potential difference water starts entering to the xylem of the root.

So, the correct answer is 'Root pressure'
Multiple choice biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

Root pressure is caused by

  1. Osmosis

  2. Diffusion

  3. Passive transport

  4. Uphill transport
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Root pressure is caused in the Xylem vessels due to osmosis. It is a positive pressure which is developed due to Osmotic pressure which is high in the root as compared to the water column above.

Diffusion is a very slow process and hence plant do not just depend on it for the ascent of sap.
Since it is not occurring through specialised proteins or usage of energy, it is neither passive transport nor uphill transport 
So the correct answer is 'Osmosis'.

Multiple choice biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

Which condition will not favour guttation?

  1. High moisture

  2. High DPD in leaf

  3. Accumulation of ions in root side

  4. Low light intensity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Guttation occurs due to high root pressure when transpiration is low. A high DPD (Diffusion Pressure Deficit) in the leaf indicates water stress, which would pull water into the leaf cells rather than forcing it out through hydathodes.

Multiple choice biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

Identify the correct sequence of movement of water in the root of higher plants.

  1. Epidermic - Cortex -Pericycle-endodermis - phloem

  2. Epidermis -Cortex-endodermis -pericycle -phloem

  3. Epidermis -Cortex -pericycle-endodermis -xylem

  4. Epidermis -Cortex-endodermis-pericycle -xylem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Water will take the path of least resistance through root to reach the xylem. Water can move across the root via three different pathways. Once in the endodermal cells, the water freely enters the xylem cells where it joins the fast-moving column of water or transpiration stream, headed to the leaves.
So the correct option is 'Epidemic - Cortex -Pericycle-endodermis - phloem'.
Multiple choice biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

Force responsible for exudation of liquid drops from the margin of the leaves is

  1. Negative hydrostatic

  2. Transpiration pull

  3. Imbibition

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

  • Negative hydrostatic pressure develops at the time of water loss, it occurs when the water is lost through transpiration and creates tension in the cell.
  • Transpiration is the process in which water is lost through the upper or aerial plant parts in the form of water. 
  • Imbibition is the swelling of cells that occurs due to the absorption of water. 
  • Positive pressure is the force in the xylem which exudates drops of liquids through the stoma to the outside and also requires hydathodes which help in the process of guttation (exudation of water droplets mostly from the leaves margins). 
So, the correct option is 'Positive pressure'.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Hepatic portal system is found in

  1. All mammals

  2. All amniotes

  3. All vertebrates

  4. Higher invertebrates

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A) The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver. It is present in mammals.

B) Not all amniotes have a hepatic portal system.
C) The hepatic portal system is found in amphibians and mammals.
D) Higher invertebrates do not have a hepatic portal system.
E) Mammals have a hepatic portal system.
So the correct answer is 'All mammals'.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Humans have a

  1. Closed circulatory system

  2. Circulatory system

  3. Open circulatory system

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

The circulatory patterns are of two types open or closed. Open circulatory system is present in arthropods and molluscs in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses. Annelids and chordates (example humans) have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels. This pattern is considered to be more advantageous, as the flow of fluid can be more precisely regulated.