The half-life of carbon-14 is approximately 5,700 years. using this information scientists have been able to determine the age of some artifacts left by humans. a scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. if the wood had gone through 3 half-lives, about how old is the wood?

2. what process do mrna and trna work together to complete? (3 points)

Which process of living things produces water that enters the water cycle

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.