(A) Available energy increases and pesticide concentrations increase as you move up a food chain

(B)Available energy increases and pesticide concentrations decrease as you move up a food chain

(C)Available energy decreases and pesticide concentrations increase as you move up a food chain

(D)Available energy decreases and pesticide concentrations decrease as you move up a food chain

(A)  that is where the rain falls

(B)it is the warmest

(C) it is where most organic matter is found

(D) it is the coolest

(A) DDT

(B) CFC

(C)Radioactive substances

(D) PAN

(A) entering of polluted water to the water table

(B)the construction of polluted water

(C)the construction of well.

(D)construction of bore wells

(A) Cholera

(B)Typhoid

(C)Cryptosporidiosis

(D)Malaria

(A) radioisotopes

(B)synergists

(C)stimulants

(D)endocrine disrupters

(A) contamination by human wastes

(B)phosphorus contamination

(C)decreased biological oxygen demand

(D)hydrocarbon contamination

(A) gases escaping the earth

(B)particles reflected off the moon

(C)particles given off by the sun

(D)radiation from earth's magnetic field

(A)  Heavy rainfall (from a single storm) in an area of low average annual rainfall.

(B)Steep slopes in a tropical rainforest.

(C)An agricultural region where soil conservation practices are implemented.

(D)An area that has been urbanized for several decades or more.

(A) It accumulates in the tissues and caused infertility in the females.

(B)It causes cancer in the adult birds and a high percentage of them die from it.

(C) It causes the females to lay eggs with very thin shells that break during the incubation period killing the chicks.

(D)The chicks are missing a “tooth” that enabled them to break the shell. They die because they cannot get out of the shell.