A central carbon atom bonded to an amino acid group and an R group.
Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation:
<span>Meiosis reduces chromosome number so that sex cells (eggs and sperm) have a half set of chromosomes–one homolog of each pair. This is the haploid number. CONGRATULATIONS! YOU'RE SO SMART!</span>
The best answer to fill in the blank is "multilayered membrane."