Answer:
an element is a pure substance which can not be spilt into simpler substances by chemical means
Explanation:
examples hydrogen, oxygen, copper
Answer:
One thing missing would be the units of the rates and measurments
The independent variable is the light intensity and the dependent is the rate of photosynthesis
Explanation:
Answer:
The immune system is made up of two armies of cells
Explanation:
I think so~~
Answer:It includes the human-initiated burning of vegetation for land clearing and land-use change as well as natural, lightning-induced fires. Scientists estimate that humans are responsible for about 90% of biomass burning with only a small percentage of natural fires contributing to the total amount of vegetation burned.
Explanation:
i just copied and pasted it off the internet sooo.... yeah
