Afather is now three times as old as his son. twelve years ago he was six times as old as his son. how old are the son and father now

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

All of the following are possible solutions that may be used to address agricultural issues in the future except decrease biodiversitydecrease pesticide usedevelop "cleaner" pesticidesincrease organic farming

Which of russia’s climate zones is most likely to support the coniferous trees described here? a. tundra c. taiga b. steppe d. humid continental