Would it be unreasonable to expect a family of 7 children to all be the same sex

i'd say that the moon rock is about 2.2 billion years old.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

i think that it is plants