threats to biodiversity-- pesticides

Question 1

what is a pest?

Answer 1

any organism that causes illness or harm

Question 2

what is a pesticide?

Answer 2

a chemical or biological substance that kills pests

Question 3

what are the 4 types of pesticides?

Answer 3

• herbicide (for plants)
• insecticide (for insects)
• bactericides (for bacteria)
• fungicides (for fungi and mold)

Question 4

what are 3 benefits to using pesticide?

Answer 4

• grow more crops
• reduce cost of food
• control disease

Question 5

what are 4 problems with pesticide?

Answer 5

• bioaccumulation
• biomagnification / biological magnification
• pesticide resistance
• nontarget species

Question 6

what is bioaccumulation?

Answer 6

the gradual buildup of a substance in an organisms body

Question 7

what is biomagnification?

Answer 7

the increase in concentration of a substance as it moves higher up the food web.

Question 8

as trophic level increases, pesticide concentration _____

Answer 8

increases

Question 9

what is pesticide resistance?

Answer 9

when pesticides are used for a long time, the pest may become resistant to the pesticide.

Question 10

what is nontarget species?

Answer 10

pesticide sometimes kills off unintended targets which disrupts the food web

Question 11

we can reduce pesticide pollution by not using pesticide and ______________

Answer 11

suffering damage to crops

Question 12

we can reduce pesticide pollution by creating ______ _____ pesticide

Answer 12

narrow target

Question 13

we can reduce pesticide pollution by creating pesticides that ____ _____ into _____ substances after use

Answer 13

break down / harmless

Question 14

we can reduce pesticide pollution by using biological control, which means ____________

Answer 14

using natural predators