def select_rois(cur, exp_id):
    """Selects ROIs from the given experiment.
    
    Args:
        cur (:obj:`sqlite3.Cursor): Connection's cursor.
        exp_id (int): ID of the experiment.
    
    Returns:
        List[:obj:`sqlite3.Row`]: Sequence of all ROIs for the experiment.
    
    """
    cur.execute("SELECT id, experiment_id, series, "
                "offset_x, offset_y, offset_z, size_x, size_y, "
                "size_z FROM rois WHERE experiment_id = ?", (exp_id, ))
    rows = cur.fetchall()
    return rows