Which of the following is/are correct?
1
Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism or individual.
2
Biomagnification is the accumulation of toxic substances when they enter a food chain.
3
The concentration of the toxic substance increase as the number of predators in a food chain increases.
4
The toxicity of toxic substance increase in bioaccumulation as the life span of individuals decreases.