Uuservations 5
Observe the arrangement of cells in the prepared slide of the artery and vein.
(Low power will be best to see the whole cross section). What evidence do you see
that these two blood vessels are organs?
I can tell these blood vessels are organs because...

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

b - the respond is innate and varies over time.

good luck!

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.