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प्रश्न
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
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उत्तर
As plants emit CO2 during breathing, plants kept under constant light survive longer. In the case of plants maintained in the dark, CO2 causes a shortage of oxygen, causing the plant to die sooner.
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संबंधित प्रश्न
Why is it necessary to excrete waste products?
The form in which glucose in stored in liver.
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.
Name the two parts of a plant through which its gaseous waste products are released into the air.
Define excretion. Name the excretory unit of a kidney.
If a patient is out on dialysis, he is most likely suffering from a severe ailment of the:
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system
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
tannins and resins
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Given below is a set of five terms. Rewrite the terms in their correct order so as to be in logical sequence.
Afferent arteriole, renal vein, secondary capillary network, glomerulus, efferent arteriole.
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Differentiate between the following pairs of term :
Renal pelvis and renal papilla
Choose the odd one out in the following series:
Renal fat, renal capsule, nerve.
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
Complete the following sentence with appropriate word:
______ is the functional unit of kidney.
Complete the following sentence with appropriate word:
______ supplies blood to kidney.
Answer the following question.
Amphibian tadpole can afford to be ammonotelic. Justify.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
The statement given below is false. Rewrite the correct form of the statement by changing the underlined word.
The pigment urochrome is the breakdown product of the haemoglobin of dead RBCs.
