Thorns and spines are analogous organs. Analogous organs are those which have different function but have similar look and structure.
Thorns are basically modified stem and spines are modified leaves. Both the thorns and spines are different in structure but they have same function which are as follows -
The correct option is ANALOGOUS STRUCTURES. Analogous structures are structures that are similar because of the functions they carry out and because of their external appearance. But these structures are different internally.<span />
<span>Transfer of materials into a cell against a concentration gradient from low to high concentration requires active transport because you need energy for it to happen since its going againist the concentration gradient.
Human uses his legs for locomotion and movement similarly in amoeba pseudopodia is used for movement in amoeba and other unicellular organisms.
Pseudopodia is a structure in amoeba which is used for movement and locomotion in amoeba and it is also used for engulfing food, amoebic movement is also considered as a protoplasmic movement.
