Advertisements
Advertisements
Question
Explain the importance of soil for plant growth.
Advertisements
Solution
Soil is very important for the growth of the plant for the following reasons -
- Soil provides the base for the growth of the plants and provides a platform for the penetration of roots.
- It acts as a reservoir of the water.
- Soil has different minerals essential for the growth of the plant. Soil is the only medium from which soil obtains nutrients.
- Soil has organic materials essential for the growth of the plants.
- Soil has microorganisms that have a symbiotic relationship with the plant and these microbes assist the plant in their growth and life processes.
APPEARS IN
RELATED QUESTIONS
_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.
State the exact location of the Loop of Henle.
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
Explain Selective reabsorption
Where is the dirty blood in our body filtered?
Why do some people need to use a dialysis machine? What does the machine do?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
Name the main waste which passes into the dialysing solution.
What is the function of excretory system in humans?
What is urethra?
The procedure of cleaning the blood of a person by using a kidney machine is known as:
(a) ketolysis
(b) hydrolysis
(c) dialysis
(d) photolysis
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?
Answer the following in detail.
Explain the process of transpiration. Describe some factors that affect it.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Choose the correct answer:
Narrow apex of pyramid in kidney is called ___________
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Write two differences in composition of the blood flowing through the blood vessels, 'A' and 'B'.
Name the Following
The branch of renal artery which enters into Bowman’s capsule.
Choose the Odd One Out:
Hypotonic filtrate is formed in _______.
The habitat of animals that excrete nitrogenous waste in the form of urea.
The mode of excretion of nitrogenous wastes like ammonia which takes place by simple diffusion is called ______.
