Answer:
The correct answer is - warning system.
Explanation:
Warning systems are a type of system that could be technical or biological in nature that can help in assessing or inform about the possible danger or change in a particular setting such as ecosystem, weather, water quality, and many others. It helps in avoiding such threats before occurring or become serious threats.
Certain biological species that live or require a particular set of conditions for their survival and reproduction can act as a biological warning system for water pollution, air pollution.
It shows the evolution of certain species through the bone structures of the fossils.
Answer:
yea it should be fine. I'm not sure but. it makes sense to me.
Answer:
You could use a magnet to collect the iron, and then wash the sawdust off. Hope this helps :)
Unicellular has one singular cell, multicellular has more than one
