While working in the chemistry lab, matthew accidently spilled acid on the lab table. what should his first step be?
a) matthew should use the eyewash.
b) matthew should inform the teacher about the spill.
c) matthew should try and hide the spill with paper towels.
d) matthew should push the liquid back into the container with his hands.

B. He should inform his teacher. The teacher has the proper materials to be able to clean up the spill and knows what properties the chemical has, and Matthew might not know.

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