4.6 billion years ago the earth formed
The main function of white blood cells is to help protect the human body from infection as well as other foreign materials. White blood cells are also known as leukocytes, and they develop in bone marrow from stem cells. There are five different types of white blood cells<span>, including neutrophils, lymphocytes, monocytes, eosinophils and basophils.</span>
I think the answer would be pesticides... i see you selected it though. was that a wring answer?
Biology answers many questions<span>, </span>but its main focus is<span> how living organisms interact and function.
hope it helped give thanks :)
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Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value