If breaking apart rocks can cause construction clean up, then breaking rocks apart can cause what? Answer choices: - Damages them - construction clean up - fissures of hot, acidic water - looseness of dirt or compost - harmful substances - permineralization - forest is destroyed - the Great Barrier Reef
construction clean up

If antigens are molecules that can cause an allergy, then an allergy can be caused by? Answer choices: - antigens - Pesticides - cold weather - fever - viruses - food - Smoking - germs
antigens

If frogs have permeable skin that easily absorbs substances from the environment, then what feature allows frogs to absorb substances from the environment? Answer choices: - four limbs - poison dart frog - hydrate their cells - permeable skin - layers of fat - a cuticle - predators - double eyelid
permeable skin