In the cells of many eukaryotic species, the nuclear envelope has to disappear to permit which of the following events in the cell cycle? a) dna synthesis b) attachment of microtubules to kinetochores c) separation of the centrosomes d) condensation of the chromosomes

The cells of many eukaryotic species, the nuclear envelope has to disappear to permit the ''attachment of microtubules to the kinetochore''

Option B

Explanation:

One of the most important and ideal Hallmark of cell division is the ''mitosis'' and ''meiosis'' , both of which requires the attachment of the microtubules of the cell to the kinetochore of the chromosome. These microtubules pull the chromosomes to the opposite poles thereby facilitating the splitting of the parent cells into 2 daughter cells.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

answer/// the nucleoid region contains dna; ///