What is a place like a fridge or a box with a consistent high temperature where i can put a banana in for three days for my science experiment?

If you are looking at how the skin oxidizes, the temperature of you house would be just fine (it might take 4-5 days though), however, if it is warm where you live, you could keep it on the porch, or somewhere safe. If not, keep it near a window where the sun is prominent, or you could keep a box over a heat vent in your house (of course with a couple holes to let heat out), and put the banana in there.

Explanation:

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.