When the body cells of an animal remembers each specific pathogen it encountered in the past, nsuch immunity is said to be ____________ immunity Posted on:
Which of the disorder of immune system function can affect the formation of active immunity Posted on:
When B-cells and T-cells are activated by a pathogen, ________ cells of B-cells and T-cells develops Posted on:
Linnaeus divided plants into 24 classes based in large plant on the number, union and length of stamens. Plants with one stamen were placed in class monandria; those with two stamens in class Posted on:
A famous work running into 12 volumes, containing illustrations and descriptions of 742 plants, comprising their habit, foliage, flowers, fruits, colour e.t.c. was credited to Posted on: