Which of the following is an observation and not an infrence

1.a) cup with steam coming from it will be hot to the touch
2.b) dark clouds in the sky will mean rain later in the afternoon
3.c) bubbles form when two chemicals are mixed together
4.d) a plastic bag moving along the ground is being pushed by the wind

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.

Secondary succession would most likely be taking place in a(n)

What is hydroelectric power produced by?