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In plants, facilitated diffusion helps in the transport of minerals across the cell membrane by using:
The root hairs are the extensions of:
In root, it separates extracellular space into two compartments:
Movement of water is correctly represented by
Out of the following, which one is the common type of transpiration?
The special pores present in cork tissue for exchange of gases are:
It is the attraction among water molecules which holds them together within the xylem tube:
In ___________ pathway, water molecules move through plasmodesmata from one cell to the other.
Apoplast pathway can take water up till:
Rate of transpiration will increase by increasing all except:
It is the main factor that is involved in uptake of water to aerial parts of plants:
Pure water has maximum water potential which by definition is:
Significance of transpiration lies in:
The hormone which reduces the rate of transpiration by stopping K+ influx into the guard cells:
It is the most widely accepted theory of carbohydrate translocation:
The diagram represents the movement of water through a plant. Which row identifies the processes involved during the stages of water movement shown?
The cells which supply ATP and proteins to sieve tubes are:
Wilting appears due to excessive:
Which of the following correctly represents carbohydrates in plants?
Arrange the following events in an order that explains the mass flow of materials in the phloem.1-Water diffuses into the sieve tubes
2-Leaf cells produce sugar by photosynthesis
3-Sugar molecules are actively transported into sieve tubes
4-Sugar is transported from cell to cell in the leaf
5-Sugar moves towards sink for utilization
In humans, the transportation of various substances is accomplished by:
Bicuspid valve is:
The number of pulmonary veins that can carry oxygenated blood to left atrium are:
Left ventricle is thick-walled as compared to other chambers of heart because it:
In humans, the closed sac which surrounds the heart is:
At the end of abdomen, aorta bifurcates into:
Heart receives ___________blood during diastole.
Which one of the following pair is mismatched?
During checkup of heart patient, doctor heard the ‘dubb’ sound with stethoscope. This sound was produced due to:
How many double circulations are normally completed by the human heart in one minute?
To reach the left side of human heart, the blood must pass through:
During ventricular systole, the oxygenated blood is pumped into:
B-lymphocytes directly develop from:
Most abundant agranulocytes in blood are:
The major function of basophils is to:
The pH of blood is:
These are the blood vessel which have thin walls for nutrient exchange with tissue fluid:
Blood clotting is prevented by the presence of:
Which protein plays a major role in maintaining osmotic balance?
The cardiac impulse is initiated and conducted further up to ventricle. The correct sequence of conduction of impulse is
The type of agranulocytes which stay in blood for few hours and then enter the tissue and become macrophages are:
Thoracic lymph duct of the lymphatic system opens into:
Identify the true option with respect to lymph:
Physical barriers of immunity include:
These are the proteins produced by body against bacteria and help to immobilize them:
Antigen antibody complexes formed in body are removed by:
How many disulfide bridges are present between light chains in an antibody molecule?
Mr. Raheel went through kidney transplantation after ESRD. His transplanted kidney was destroyed earlier than expected. This might be because of the action of:
The antiserum is made from plasma taken from horse. A few weeks later, the antiserum is used to treat a person who has been bitten by the same species of snake.What does the person’s treatment bring about?
The diagram shows the relationship between the red bone marrow, the thymus gland and the lymph nodes. What does ‘X’ represent?
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