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प्रश्न
“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.
उत्तर
The statement is incorrect since plants respire and expel carbon dioxide at all times,but they only give out oxygen during the day because photosynthesis can only occur in the presence of sunlight.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Gums and resins are the .......... products of plants.
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
Fill in the blank.
....................... are present in the stem of pine tree that make the pinewood strong and durable.
Answer the following in short.
What is excretion?
Answer the following in short.
List five waste products of plants.
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Define the following term:
Micturition
Define the following term:
Osmoregulation
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1 to 8 are as follows:
1. Afferent arteriole from renal artery
2. efferent arteriole
3. Bowman’s capsule
4. Glomerulus;
5. Proximal convoluted tubule with blood capillaries;
6. Distal convoluted tubule with blood capillaries;
7. collecting tubule;
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where does ultrafiltration take place?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Name the functional units of the kidneys.
Explain the functioning of kidney.
Write the functional activity of the following structure: Henle’s loop
Choose the correct option.
Visceral layer : Podocytes :: PCT : ________.
Choose the correct option.
Specific gravity of urine would _______ if level of ADH increases.
The habitat of animals that excrete nitrogenous waste in the form of urea.
The number of ATP molecules required to produce one molecule of urea from the omithine cycle.
The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through a semi-permeable membrane is known as ____________.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
Give two examples of the following:
Bile pigments
