Conservation biology<span> is the management of nature and of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions.</span>
Explanation:
Homologous chromosomes are 2 physically different chromosomes that have the same genes but are not genetically identical. Sister chromatids are 2 copies of a single chromosome and so are genetically identical (they also are physically attached to one another).
It's Like a Puzzle Pieces and that Every Piece Goes together and Holds everything in Place or a Big Clothes Hanger :D You Good?
The correct answer is Nucleic Acids. I hope this helps. :)