7.4 Flashcards
(5 cards)
1
Q
what are pesticides ?
A
pesticides are the substances that kill the pests that destroy human crops
2
Q
what is bioaccumulation
A
the increase in the concentration of a substance in an organism
3
Q
when dose bioaccumulation happen
A
it happens in an organism at each stage along the food chain
4
Q
how dose toxins build up in each organism
A
because each predator eats a lot of prey
5
Q
how does bioaccumulation effect the other species in an ecosystem
A
prey numbers may build up putting stress on the other food sources
