(Q).
Q: How many pathways do plants have for carbon fixation? Choices: - two - five - eleven - three A:
(A).
three

(Q).
Q: What is a process in which some substances change into different substances? Choices: - a toxic reaction - a bio reaction - a thermodynamic reaction - a chemical reaction A:
(A).
a chemical reaction

(Q).
Q: Where do the cells in your body get oxygen from? Choices: - white blood cells - the digestive system - pores - red blood cells A:
(A).
red blood cells