Uhhhhh I think it's plant cells!!
First box is AA. Second box is Aa. Third box is aa.
Explanation:
nervous tissue is small unit of nervous system
Answer: D. Ecosystems experience change through human activity and natural events.
Ecosystem undergoes change due to both human and natural events. The ecosystem and the humans are interconnected. The activities of humans will affect nature and by that the ecosystems usual routines are also affected by such changes.
The steps for DNA replication are generally the same for all prokaryotic and eukaryotic organisms. Unwinding the DNA is accomplished by an enzyme named DNA helicase. Manufacturing new DNA strands is orchestrated by enzymes called polymerases.