What role do plankton play in the oxygen cycle? O A. They release carbon dioxide in the ocean.
O B. They produce oxygen in the forests.
C. They produce oxygen in the ocean.
D. They absorb carbon dioxide in the forests.

Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated. 1. sporophyte dominance, gametophyte independence 2. sporophyte dominance, gametophyte dependence 3. gametophyte dominance, sporophyte dependence a) 1 → 2 → 3 b) 2 → 3 → 1 c) 2 → 1 → 3 d) 3 → 2 → 1 e) 3 → 1 → 2

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Organisms that successfully adapt will leave to grownone of the above