Tag: transportation in plants and circulation in animals

Questions Related to transportation in plants and circulation in animals

Which pressure is responsible for ascent of sap?

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

  1. Negative hydrostatic pressure

  2. Positive hydrostatic pressure

  3. Root pressure

  4. All of the above

Show answer
Correct Option: C
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'

Root pressure is caused by

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

  1. Osmosis

  2. Diffusion

  3. Passive transport

  4. Uphill transport

Show answer
Correct Option: A
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'.

Which condition will not favour guttation?

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

  1. High moisture

  2. High DPD in leaf

  3. Accumulation of ions in root side

  4. Low light intensity

Show answer
Correct Option: B

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

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

  1. Epidermic - Cortex -Pericycle-endodermis - phloem

  2. Epidermis -Cortex-endodermis -pericycle -phloem

  3. Epidermis -Cortex -pericycle-endodermis -xylem

  4. Epidermis -Cortex-endodermis-pericycle -xylem

Show answer
Correct Option: A
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'.

Root pressure is generally not found in 

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

  1. Wheat plant

  2. Colocasia

  3. Pinus

  4. All of these

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Correct Option: A

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

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

  1. Negative hydrostatic

  2. Transpiration pull

  3. Imbibition

  4. Positive pressure

Show answer
Correct Option: D
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'.

Hepatic portal system is found in

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

  1. All mammals

  2. All amniotes

  3. All vertebrates

  4. Higher invertebrates

  5. None of these

Show answer
Correct Option: A
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'.

Animals of which phylum contains open circulatory system?

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

  1. Arthropoda

  2. Annelida

  3. Hemichordata

  4. Both (a) and (c)

Show answer
Correct Option: D
Explanation:

Both Hemichordata and Arthropoda has an open circulatory system. In this system the heart pumps blood into an open cavity called a hemocoel.


How many of the examples mentioned posses closed (C) and open(O) circulatory system?

Cephalopod molluscs, non-cephalopod molluscs, Chordates, Annelids, Tunicates, Hemi-chordates and Arthropods
types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. C$=2$, O$=5$

  2. C$=4$, O$=3$

  3. C$=5$, O$=2$

  4. C$=3$, O$=4$

Show answer
Correct Option: A

Humans have a

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

  1. Closed circulatory system

  2. Circulatory system

  3. Open circulatory system

  4. None of the above.

Show answer
Correct Option: A
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.