Answer:
C
Explanation:
Invasive species are usually species that enter an environment and cause destruction to the food chain, biodiversity, and the overall way of life. The toad outcompeteing the frogs that are supposed to be in the environment suggest it's an invasive species.
An introduced species would be if the toad was purposely introduced to the environment, which it was not.
Answer:
Brushing too hard can erode the enamel on your teeth and cause gum recession. Many electric toothbrushes can solve this problem, too. They have pressure sensors that warn you if you're pressing too hard. That way, you can develop a proper touch that will remove plaque, but not damage your teeth and gums.
Explanation:
Electric toothbrush bristles vibrate or rotate to help you remove plaque buildup from your teeth and gums. The vibration allows for more micro-movements every time you move your toothbrush across your teeth
Which of the following is a form of pollution triggered by formation of a gas, and can have dramatic effects on the health of a coral reef ecosystem?
fog
pesticides
Acid Rain
oil spill
the answer is acid rain hope this helps
Answer:
oxygen
Explanation:
The oxygen makes up 21% of the atmosphere. hope it helps.
The correct answer here is "cell membrane". Generally it makes sure that nothing enters or leaves the cell, except by its highly guarded "gates", such as ion channels, that let some particles through - but they're very picky about whom to let in!
