How did ddt nearly drive the peregrine falcon to extinction in the 1950s and 60s?
a. reproductive disruption
b. blindness
c. cancer
d. feather loss

DDT nearly drove the Peregrine Falcon to extinction in the 1950s and 60s by disrupting their reproductive cycle. The falcon's prey would eat the insects sprayed with DDT and then the falcon would eat infected the prey. The falcon then laid eggs with very thin shells which were crushed when the female bird sat on them. 
DDT is an insecticide and pesticide that does not break down in the environment. It stays active throughout many cycles of life. This can be seen in the above example. 

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.