Home
Class 12
BIOLOGY
There are many different strains of rhin...

There are many different strains of rhinoviruses, which cause common cold. State why people are suffering from common cold several times within two or three months.

Text Solution

Verified by Experts

There are two views regarding this.
a. Common cold results in the production of only short term memory cells during primary immunity. Then the secondary immune response does not occur for a long span of time.
b. For different viruses different antibodies are produced in the human body.
Promotional Banner

Topper's Solved these Questions

  • HUMAN HEALTH AND DISEASE

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR HSE QUESTIONS|12 Videos
  • HUMAN HEALTH AND DISEASE

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR COMPETITIVE EXAM QUESTIONS|28 Videos
  • HUMAN HEALTH AND DISEASE

    NEW JOYTHI PUBLICATION|Exercise NEW EVALUATION TYPE QUESTIONS|43 Videos
  • EVOLUTION

    NEW JOYTHI PUBLICATION|Exercise Previous Year Competitive Exam Questions(MCQs)|50 Videos
  • HUMAN REPRODUCTION

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR COMPETITIVE EXAM|18 Videos

Similar Questions

Explore conceptually related problems

Common cold is differs from the pneumonia in , that:

Read the paragraph and answer the following question: You must be knowing about the high and low tides that occur regularly in the sea. The level of the sea water at any given location along sea shore increase and decreases twice a day at regular intervals. High and low tides occur at different times at places. The level of water in sea changes because of the gravitational force exerted by the moon. Water directly under the moon gets pulled towards the moon and the level of water there goes up causing high tide at that place. At two places on the earth at 90^(@) from the place of high tide, the level of water is minimum and low tides occur there. How many times the sea level at the coast change?

There are two sets A and B each of which consists of three numbers in A.P.whose sum is 15 and where D and d are the common differences such that D-d=1. If p/q=7/8 , where p and q are the product of the numbers ,respectively, and d gt 0 in the two sets . The sum of the products of the numbers is set A taken two at at time is

Tangent is drawn at the point (x_i ,y_i) on the curve y=f(x), which intersects the x-axis at (x_(i+1),0) . Now, again a tangent is drawn at (x_(i+1,)y_(i+1)) on the curve which intersect the x-axis at (x_(i+2,)0) and the process is repeated n times, i.e. i=1,2,3dot,ndot If x_1,x_2,x_3,ddot,x_n from an arithmetic progression with common difference equal to (log)_2e and curve passes through (0,2)dot Now if curve passes through the point (-2, k), then the value of k is____

Tangent is drawn at the point (x_i ,y_i) on the curve y=f(x), which intersects the x-axis at (x_(i+1),0) . Now, again a tangent is drawn at (x_(i+1,)y_(i+1)) on the curve which intersect the x-axis at (x_(i+2,)0) and the process is repeated n times, i.e. i=1,2,3dot,ndot If x_1,x_2,x_3,ddot,x_n from an arithmetic progression with common difference equal to (log)_2e and curve passes through (0,2)dot Now if curve passes through the point (-2, k), then the value of k is____

Match the terms given in column I with their descriptions given in column II and select the correct option from the codes given below. {:(,"Column-I",,"Column-II"),((A),"Out-crossing",(i),"Mating of closely related individuals within the same breed"),((B),"Interspecific hybridisation",(ii),"Mating of animals of same breed but having no common ancestors on either side of their pedigree for 4-6 generations"),((C),"Cross-breeding",(iii),"Mating of animals of two different species"),((D),"Inbreeding",(iv),"Mating of animals belonging to different breeds"):}