"one negative consequence of using an insecticide is that it
(1)selects for insecticide-resistant organisms
(2)keeps a balance of organic compounds
(3)encourages biodiversity in plants
(4)gives the nonresistant aphids a survival advantage"

How can you keep track of variables in a science experiment?

Matched chromosomes carrying information about the same characteristics in the organism are called

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water