Advertisements
Advertisements
प्रश्न
What would happen if green plants disappeared from earth?
उत्तर
Green plants are the sources of energy for all the heterotrophs on earth. Plants convert solar and chemical energy into viable food sources. If plants disappear from the earth it leads to an imbalance in the ecosystem and heterotrophs may die without food.
APPEARS IN
संबंधित प्रश्न
The nephrons discharge their urine at ______.
the biological/technical terms for the hormone increasing reabsorption of water by kidney tubules
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
Blood in the renal artery or renal vein (Which one has more urea ?)
Name the two waste products of the human body which are produced in the body cells.
Fill in the following blank with suitable word:
The organs which extract the nitrogenous wastes from the blood are ..........
The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?
Differentiate between the following pairs of terms:
Bowman’s capsule and malpighian capsule.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Explain the difference between the excretory system of humans and plants.
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
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.
Study the diagram given alongside and then answer the question that follow:
What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Name the Following
The division of the kidney which is light in colour and subdivided into conical renal pyramids.
Complete the following sentence with appropriate words:
The outer surface of the kidney is ______ while the inner surface is ______.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
Among the following animals, the best conserver of water is ______.
In a person the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?
Given below is a list of substances - select the ones that need to be eliminated from the body.
Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid.
Which of the following is not an example of secretion?
