Discussion
In the majority of plants photosynthesis is carried out in leaves but in cachi inhabiting desert, photosynthesis is carried out by stem. This type of evolutionary change in the position is referred to as ...........................
Answer: C
A change in the position of a developmental feature is heterotopy.
Heterotopy is an evolutionary change in where a structure or process develops in the body. In cacti (printed 'cachi') the leaves are reduced to spines and photosynthesis shifts to the green, fleshy stem, a change in location.
Heterochrony is a change in the timing or rate of developmental events. Heteroplasmy is the presence of more than one type of mitochondrial DNA in a cell. Heterotropy is not the standard term for a change in position.
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