Because their soft tissue and bones decay or get eaten before a fossil can be made.
RNA makes a copy of a gene from DNA to mRNA .
<span>Physical weathering is a term used in science that refers to the geological process of rocks breaking apart without changing their chemical composition. Over time, movements of the Earth and environment can break apart rock formations, causing physical weathering.</span>
Answer: i believe it’s A and C
Explanation: i took biology and remember these lessons