Correct answer
D. Smallpox
Explanation
Smallpox is an infectious disease. Cellular immunity and humoral immunity are elicited in response to variola infection. The attenuated virus of smallpox activate the immune response and create memory in the B-cells.
The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is_______________?
Synthetic insulin is produced using which technique?
With different chemical arrangements and formation Of complex molecules, the life emerges on the level of the ?
Which one is the basic element of organic compounds _________________?
People living in high altitudes (like mountains) usually have a _________?
In most birds air sacs are ____________ in number?