A Only one variable changed
Answer: i would say the independent variable is the soil and the control variable is the seed because it stays the same in all of them to better understand the experiment while the dependent variable is the fertilizer.
Explanation: i am not completely sure but maybe someone else can also answer to verify it first
Hello to answer your question.
A is correct
But more likely forest fires would be the culprit because the trees produce O2
so when the are burnt, it would be like everybody o this earth breathed out at once causing CO2 to be released in to the atmostphere in a big burst
Signed by, Virtuoso Sargedog
Answer:
Comparing DNA
Explanation:
Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA. Similar DNA sequences are the strongest evidence for evolution from a common ancestor.
