Answer:
D) It contains compounds and is therefore a substance
Explanation:
A mixture is composed of multiple compounds.
Answer:
a and b
Explanation:
This may not be right, but from what i remember it should be when the moon is aligned with the sun then the tide is highest
Answer:
a scientific theory of the origin of species of plants and animals
Answer:
The results are not able to be reproduced.
Explanation:
Generally, if an experiment is done and the results/similar results can not be reproduced then it can be considered invalid.
Answer:
Ethylene
Explanation:
Ethylene is a hormone required to trigger fruit ripening, and it can be blocked by using synthetic compounds, such as 1-methyl-cyclo-propene (1-MCP).
