Question

Which of the following statements is incorrect?
A. All movements lead to locomotion.
B. Ciliary movements help in passage of ova through the female reproductive tract.
C. Microfilaments are involved in amoeboid movement.
D. In Paramoecium, the cilia help in the movement of food through cytopharynx and in locomotion as well.

Answer 1

Hint: One of the significant features of living beings is movement. Different animals and plants exhibit a wide range of movements. The simplest kind of movement is the steaming of protoplasm in unicellular organisms such as Amoeba. Different organisms may show movement through cilia, flagella and tentacles. Some movement results in a change of place or location.

Complete Step by Step Answer:
Not every movement leads to locomotion. Locomotion means the voluntary movements. Voluntary movements are those movements that are in the voluntary control of the central nervous system. Locomotion leads to change in location or body posture. Thus, statement A is incorrect.

The cells in a human body exhibit different types of movement:- amoeboid, ciliary and muscular.
In most of the tubular organs of our body which are lined by ciliated epithelium causes ciliary movement. For example, passage of ova through the female reproductive tract is due to ciliary movement. Thus, statement B is correct.

Cilia also helps in the movement of food through cytopharynx and in locomotion as well in Paramoecium. Thus, statement D is correct.
Amoeboid movement is due to the streaming of protoplasm that forms the pseudopodia (false feet). Microfilaments are involved in the amoeboid movement. Macrophages and leucocytes in our body exhibit such movement.
Thus, statement C is correct.

Hence, the correct answer is option A.

Note: Hydra has tentacles that help it in capturing its prey and for locomotion as well. In human beings, limbs are used for changing body posture and for locomotory purposes as well. This shows that movement and locomotion are linked with each other. All locomotions are movements but all movements are not locomotions.