Trilobite fossils have been found in rock that is 521 million years old. They have ako been found in rocks that are more than 252 million years old. Trilobite fossils have not been found in younger or older rocks. What does this tell you? Marte the one best answer.) A Trilobites became extinct 252 million years ago.

B Trilobites became extinct 521 million years ago.

C Trilobite lived on Earth for 252 million yars,

D Trilobites lived on Earth more than 521 million years

pls what literal is it ​

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above