Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. some textbooks list five, breaking prophase into an early phase and a late phase. which of these has occurred by the end of prophase?

Explanation:

At the ending of pro phase or late prophase, the mitotic spindle begins to capture and organize the chromosomes.

* The chromosomes have finished condensing and are now very compact.

* The nuclear envelope is broken down and the chromosomes are released.

* The mitotic spindle grows more, and some of the microtubules start to “capture” chromosomes.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.