According to this cladogram, which trait developed first? A. Flowers
B. Seeds
C. Wood
D. Xylem and phloem
E. Embryo

E

Explanation:

The embryo is at the complete bottom of the caldogam/is before any of the developments. If all the species have it, it developed first.

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.