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 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.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.