Answer:
Hey there!
Trilobites were common during the Cambrian Period.
Let me know if this helps :)
Answer: A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance.
Explanation:
The genetic code is considered universal because the same four nucleotide bases are used by all known organisms
It helps with the optic nerve, if you give me options i can help answer. Sorry if I didnt help :)
