B. Magma with high silica content.
I’m pretty sure
Answer: Layer a is 500 million years old.
Explanation:
Trilobite is a member of the group of extinct arthropods found as fossils and they can be identified by the three-lobed as well as three segmented forms. These were the marine animals. These were appeared initially in the Cambrian Period. They used to live 542 million years ago so the fossils can be estimated to be aged of 500 above years old. These animals used to dominate in the sea area.
Answer:
My philosophy in life is to learn something everyday, to take care of my physical and mental health, and to enjoy life serving God.
When there isn't enough room in the cell for two complete molecules of DNA, the prokaryote stops replication and undergoes cell division.
