As an undergraduate research assistant, you are assisting with a radioisotope tracer experiment. You expose a mature leaf on one side of the lower shoot of a sugar beet plant to 14CO2 and then track the movement of the 14C atoms by radiography. Where are you LEAST likely to detect 14C?

a. the roots
b. the treated leaf
c. a mature upper leaf on the opposite side of the plant from the treated leaf
d. the shoot apical meristem

Explanation:  

C-14 is an isotope of Carbon that is radioactive in nature and used for various purposes in the research and some other fields.

It is used in carbon dating, carbon labeling, and some other way.

As carbon labeling, it has may important in the detection of biochemical reactions.

Since the mature upper leaf part are away from the treated parts so the least amount of C14 is detected in such a portion.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.