My answer may not be precise, but I believe if you changed your question to "The presence of these structures indicates that the student is looking at a cell of what organism", then I would safely say a plant, because plants, unlike animals, have cell walls in addition to cell membranes. :) Hope this helps!
Heterozygous means 2 different alleles can be only Tt with T being expressed unless codominance.In the sex cell where X comes from female Y or X can be from man..Hence the allele due to it being heterozygous hence it is XY
they fly best in the troposphere
