Can the deficiency diseases be transmitted from one plant to another ?
Select the correct option to fill up the blanks. (i) Diseases which are easily transmitted from one person to another, are called ______ diseases. (ii) In human body, parasite of malaria initially multiplies within the ____ and then attack the ______. (iii) _____ is the yellowish fluid secreted by mother during the initial days of lactation. (iv) _____ and ____ are the primary lymphoid organs.
Assertion (A): Cancer is a contagious disease. Reason (R): It is transmitted from a patient to a healthy person by casual contact.
Some human diseases are transmitted only through blood in one of such diseases, there is a progressive decrease in the number of lymphocytes of the patient. (a) Name the disease and its causative agent. (b) Write any two symtoms of it.
The disease chikungunya is transmitted by
A fat person is standing on light plank floating on a calm lake. The person walks from one end to the other on the plank. His friend sitting on the shore watches him and finds that the person hardly moves any distance because the plank moves basckward about the same distance as the person moves on the plank. Explain.
Two loudspeakers are arranged facing each other at some distance. Will a person standing behind one of the loudspeakers clearly hear the sound of the other loudspeaker or the clarity will be seriously damaged because of the 'collision' of the two sounds in between ?
NCERT TAMIL-HEALTH AND HYGIENE-Evaluation (Answer in detail.)
