Using the dichotomous key, which class does this animal belong to?
~a. amphibia
~b. mammalia
~c. fish
~d. reptiles

What came first egg or chicken? and is tomato a vegetable or a fruit?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Overtime the pond slowly becomes more acidic due to the release of chemicals from a nearby factory. which of the organisms would most likely survive the change to their environment?