Plants and formed a mutualistic relationship in the form of mycorrhizae and were the first multicellular organisms on land. a) fungi

What percentage of light hits earth's surface directly?

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred