Asubstance directly involved in cellular communication within the human body is

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Actual age your first developed of age well comparison age refers to absolute age true or false

In which situations is the principle of cross-cutting relationship useful in determining relative age?