Before there was any life on earth, which gas was absent from the ancient atmosatmosphere?
1)oxygen
2)ammonia
3)nitrogen
4)methane

In general in which direction does wind blow

White-tailed deer are considered to be an overpopulated species in the central united states. which of these events probably contributed the most to white-tailed deer exceeding their carrying capacity?

Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. which punnett square represents the correct way to set up the cross rryy  ´  rryy?