Question

Taxis is movement in
A. Single cell
B. Single-celled organism
C. Cell organelles
D. All the above

Answer 1

Hint:- Taxis is the movement or the behavioural response of an organism to any external stimulus like it can be light or food. If this movement is towards the stimulus, it is positive taxis.

Complete step-by-step solution:-
If you know what taxis means then you can easily solve this question. So, taxis are the movement of an organism in response to a stimulus such as food or light and this movement in an organism can be by the movement of a single cell or the single celled organism or the cell organelles.
This movement can be towards the stimulus or it can be away from the stimulus, if it is towards the stimulus then it is positive taxis and if it is away from the stimulus then it is referred to as negative taxis.
If we look at options now, option A is Single cell. This can be the correct option since taxis can be the movement of single cells too towards the stimuli and therefore we can consider this option.
Moving to option B which is Single-celled organism. This option can also be the correct one since taxis is the movement of single-celled organisms too in response to the stimuli. Therefore, we can consider this option.
Moving to option C which is Cell organelles. This option can also be the correct one since taxis is movement in cell organelles too in response to stimuli. Therefore, we can consider this option as the correct one too.
Last option D is All the above. This is the final correct option since taxis is the behavioural movement of a cell, cell organelles or an organism to any external stimulus. Therefore, this option is correct as all the above options are correct.
Thus, the correct answer is option D which is All the above.

Note:- Taxis is the movement of cell, cell organelles or an organism but they move in response to a stimulus which can be light or food and this movement can be in a single-cell or single-celled organism or in cell organelles and thus all the above options are correct which makes the last option D most correct one.