If hydrocarbon emissions have a negative impact on the environment, then what has a negative impact on the environment? Answer choices: - forest is destroyed - habitats - animals - oxygen - deforestation - movements in the earth's crust - harmful substances - hydrocarbon emissions
hydrocarbon emissions

If fluid in the inner ear is used for sensing sound by animals, then what in the inner ear is used for sensing sound by animals? Answer choices: - neurons - Frogs. - tube - Frogs - fluid - fibers - energy - motors
fluid

If insects have a nervous system, then what do insects have? Answer choices: - four limbs - liver - sensory neurons - epidermis and dermis - lizards - spiders - important habitats - nervous system
nervous system

If brain cells die quickly if their air supply is cut off, then what happens to brain cells when the air supply is cut off? Answer choices: - strangulation - breathe - lead poisoning - death - hippocampus - painful - loss - die
death