What is the name of a threadlike structure of dna that carries genes?

I'm pretty sure your answer should be Chromosomes. (In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes.) Hope this helps! =^-^=

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!