What must a responding officer do before entering a crime scene if the conditions warrant entering? ensure that the scene is safe and cleared for the other personnel arriving on-scene

call 911

collect as much evidence as possible before it is contaminated

question any and all witnesses

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

answer: 45

explanationyou have to add as well to be it could be

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.