Answer:
It allows material to stay in and prevent outside material from entering
Explanation:
Ribosomes provide a structure in which translation can take place. ... If you're not yet familiar with RNA (which stands for ribonucleic acid), I highly recommend ... We'll learn a lot more about tRNAs and how they work in the next section. ... How does the right amino acid get linked to the right tRNA (making sure that codons ...
Organs are the level of the heartbeat
Spinal tissue should be the answer.