Question

How many of the following shows $"+-"$ interaction?
a. Fig and wasp
b. Convolvulus and wheat
c. Sparrow and seeds
d. Tiger and deer
e. Epiphytes on mango tree
f. Plasmodium and human.

• A. $5$
• B. $2$
• C. $4$
• D. $3$

Answer 1

The correct option is B $2$

'+-' reaction is called Predation and it occurs between predator and prey where one feeds on other .

So, the correct option is '2'.