D) 1 and 4
Chromosomes are made up of DNA. DNA strands contain short segments called genes.
The the exact mass is 24.740% (according to the internet) but I’d say that it’s 25
I think the correct answer is b. Temperature is proportional to the average kinetic energy so when temperarure rises so will the average kinetic energy. I hope this helps. Let me know if anything is unclear.