What are some primary contributors to background radiation?

cars, jets, and trains

televisions and computers

fossil fuels and oxygen

plants, animals, and cosmic rays

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

The asian shore crab (hemigrapsus sanguineus) is an invasive species that has impacted the atlantic coast. predict what characteristic of this invader would most likely disrupt the biodiversity of this area.

Competition occurs between species when