Choice A is the correct choice, The graduation rate in a city and the rate of unemployment in that same city would not have a positive correlation.
"antigens"
Hope this helps!
-Payshence xoxo<span>
</span>
Using hydrogen in his experiments Bohr showed that an electron spins around the atom nuclei at a specific/discrete radii (orbital levels). Electrons at every orbital level spin at a discrete angular momentum and energy. When the electron moves one orbital level down, it releases a photon of energy specific to the jump (that is, of a particular spectrum that is unique to the atom). When the electron goes up an orbital level, energy (of a specific spectrum) is absorbed. This emission and absorption spectrum varies across atoms and is calculated as (delta)E = hf where;
E = energy
h = Planck's constant
f = frequency
Based on the scenario, it would be most likely that you're looking at : C. xylem cell of a rose bush
Only plants formed a cell plate during cytokineses. From the options above, only xylem is the parts of a plant
hope this helps<span />