Until the early there were only negligible amounts of free oxygen in the atmosphere.
a. cenozoic
b. mesozoic
c. proterozoic
d. precambian

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Why can't you grow plants with adhesion water?