Class 10 Transportation|Life processes Important questions
In this page we have Important Questions for Class 10 Life processes Transportation . Hope you like them and do not forget to like , social shar
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How do organisms like amoeba transport materials? Answer
Amoeba is a unicellular organism. In unicellular organisms a single cell carries out all the life processes as the cell itself is the organism. The uptake of materials from the environment is through the general body surface and the transport within the cell is by diffusion.
Why do higher plants and animals need a transportation system? Answer
In higher plants and animals, the sites of absorption and synthesis are very specific and a greater distance from the other parts of the body. Thus, they need a transportation.
What is mass flow system? Answer
The transport of materials in bulk across the plant or animal body through the vascular tissue is called the mass flow system.
Which transport system- plant or animal, does not use muscular energy? Answer
Transport in plants does not use muscular energy.
What are vascular plants? Answer
The higher plants are also called the vascular plants as the transport in them is with the help of the vascular system.
which are the materials transported in plants? Answer
The materials transported across the plant body are water, minerals, food and metabolites like the hormones and vitamins.
What are the two types of vascular tissues? Answer
The two types of vascular tissues are xylem and phloem.
What are the functions of xylem and phloem? Answer
Xylem conducts water from the roots to the other parts of the plant and phloem conducts food from the leaves to the different parts of the body.
Which tissue conducts organic substances in plants? Answer
Phloem conducts organic substances in plants.
Why are the sieve tube cells called so? Answer
The sieve tube cells are joined end to end and their end walls are performed. This gives the appearance of a sieve and hence they are called as the sieve tube cells.
What is the process by which carbon dioxide enters the cell? Answer
The process by which carbon dioxide enters the cell is called diffusion.
Define osmosis? Answer
The process of movement of solvent particles from the region of higher concentration to the region of lower concentrations through a semi- permeable membrane is called osmosis.
What is turgor pressure? Answer
It is a positive pressure developed inside the cells due to pushing of the cytoplasm against the cell wall as cytoplasm gets more water.
When does a cell become flaccid? Answer
A cell becomes flaccid on losing water.
What is active transport? Give an example. Answer
Active transport is the transport are stomatal, lenticular and cutocular transpiration.
What is transpiration? Answer
It is the loss of water from the aerial parts of the plant in the form of water vapour
What are the three types to transpiration? Answer
The three types of transpiration are stomatal, lenticular and cuticular transpiration.
What are stomata? Where are they present? Answer
Stomata are opening on the surface of the leaves that are surrounded by the guard cells. They are present more on the lower surface of the leaves.
How is the rate of transpiration affected? Answer
The rate of transpiration is affected by many factors such as light, temperature, availability of soil water and atmospheric humidity.
Why is transpiration affected? Answer
Transpiration is important because:
It is responsible for uptake of water from the soil.
It is responsible for movement of water and dissolved minerals from the roots to different parts of the plants.
It results in cooling of the leaf surfaces, thereby protecting them from excessive heat.
What is ascent of sap? Answer
The upward movement of water along with the dissolved silutes up the xylem is called ascent of sap.
What are the two factors responsible for ascent of sap? Answer
The two factors responsible for ascent of sap are root pressure and transpiration pull.
What are root hairs? What is their function? Answer Root hairs are outgrowths of the epidermal cells. They help in increasing the surface area of water absorption.
What is root pressure? Answer
The water enters the roots through the root hairs. It then travels through the root tissue to reach the root xylem. Therefore, the xylem in the root has more water than the xylem column above it and this creates a positive pressure in the xylem of the root. This is called the root pressure.
What is transpiration pull? What is its effect? Answer The force with which the water is pulled up the xylem is called the transpiration pull. The transpiration pulls results in a continuous stream of water called the transpiration stream extending from the xylem of the leaves to the xylem of the roots.