Answer:
D
Explanation:
combustion increases carbondioxide co in the armosphere
Cardiac muscle is one of 3 major types
Statistics is the type of math utilized by scientist to analyze there data.
By nerve cells the heart has neurons and they work based on electrical potential.
I use save my exams
https://www.savemyexams.co.uk/gcse-biology-aqa-new/
And I also use past AQA papers but end of topic tests
Hope it helps :)
