How did ddt nearly drive the peregrine falcon to extinction in the 1950s and 60s?

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

The mammal pictured below is a silvery mole rat. which statement is an inference based on the picture? the animal is ugly. the animal has hairless feet with sharp claws. the animal has prominent upper and lower incisor teeth. the animal likely has poor vision since its eyes are so small.

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring