I’m sorry if it’s wrong but I think its D
The nuclear envelope is perforated with pores to allow it to move in and out of the nucleus.
Every cell in the body has a nucleus, except for mature erythrocytes (red blood cells). While some cells contain more than one nucleus such as skeletal muscle and some other cells contain several nuclei.
The nuclear envelope surrounds the nucleus. i. e. largest organelle of the cell. It has a similar structure to that of
the plasma membrane. But the nuclear envelope contains tiny pores that allow a few substances to pass between it and outside the cytoplasm, i.e. the cell contents excluding the nucleus.
Therefore, the nuclear envelope is perforated with pores to allow it to move in and out of the nucleus.
To know more about the nucleus, refer to the below link:
brainly.com/question/2437355
#SPJ4
Answer:
The Active transport along cytoskeletal filaments.
Explanation:
Cytoskeletal filaments incorporate microfilament, microtubules and intermediate filament which take into consideration faster transport than diffusion as they support cell division and the basis of movement. The active transport also maintain the right concentrations of molecules and ions within living cells.
The correct answer is <em></em>ii.
The pharyngotympanic tube or else eustachian tube is a structure of the middle ear, which connects the nasopharynx with the middle ear. The function of this structure is to equalize the pressure and drain the mucus produced by the middle ear.
