Biology [1 Mark Question Answer]

A thin strip of epidermal cells of a leaf was observed in a drop of water. They all looked turgid and normal.
(a) Draw a diagram of such a cell.
(b) Draw a diagram of a cell if this strip is transferred to a strong concentrated solution of sugar. What is term used for the effect on the cells ?

Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.

What is the water potential?

Grapes shrink when immersed in a very strong sugar solution.” Explain.

What is toxicity ?

Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.

Name the following:
The membrane which allows water molecules to pass through, but not sugar molecules.

Name the following:
The process by which raisins swell up when placed in a beaker of water.

Name the following:
Name the process by which water enters the root hair cell.

Name the following:
The movement of a liquid through a selectively permeable membrane.

Name the following:
Root hairs are the extension of which cells.

Name the following:
Root hairs are the extension of which cells.

Name the following:
The kind of cells that constitute the cortex of a root.

Name the following:
Name the process by which intact plants lose water in the form of droplets.

Name the following:
Movement of ions from the region of lower concentration to higher concentration by using energy (ATP).

Name the following:
Condition of cell in which the cell content are shrunken.

Name the following:
The condition in which the contents of a cell exert pressure against the cell wall making it distended.

Name the following:
The process by which wilting or drooping of leaves occurs.

Name the following:
The solution outside the cell having lower solute concentration than the fluids.

Name the following:
Water is absorbed from the soil by which part.

Name the following:
The condition of a cell placed in a hypotonic solution.

Give Technical Term for the following.
The pressure exerted by cell contents on a plant cell wall.

Give Technical Term for the following.
A cell in a fully extended condition.

Give Technical Term for the following.
The condition in which the water from a cell is completely removed due to exosmosis and no more shrinkage is possible.

Give Technical Term for the following.
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.

Give Technical Term for the following.
A solution whose concentration is greater than that of the cell sap.

Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.

Give Technical Term for the following.
Solutions which have the same osmotic pressure.

Give Technical Term for the following.
The tissue responsible for the ascent of sap in plants.

Give Technical Term for the following.
Tissue which transports manufactured food from leaves to other parts of the plant.

Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.

Explain why:

The leaves of wilted lettuce, if kept in cold water, become crisp.

Give Reasons for the following.
The raisins swell up in the water.

Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.

Give Reasons for the following.
Salt and sugar are used in preserving food.

Give Reasons for the following.
Plants begin to die when the excess of soluble fertilizers are added to the soil?

Give Reasons for the following.
Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered. Why?

Give Reasons for the following.
Drops of water on a leaf of plant like peepal does not enter the leaf by osmosis?

Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.

Explain the Term: Guttation

Explain the Term: Plasmolysis

Explain the Term: Exosmosis

Explain the Term: Endosmosis

Explain the Term: Osmosis

Explain the Term: Diffusion

Differentiate between the following
Turgor pressure and wall pressure

Differentiate between the following
Active transport and Passive transport.

Differentiate between the following
Permeable and Semi-permeable membrane.

Osmosis in the diffusion of _______ molecules from the region of higher _____ potential to that of lower potential across a S.P.M.