Question

Which tissue is considered as the most primitive both phylogenetically and ontogenetically?

Answer 1

Phylogeny:

1. The study of the connections between various biological groups and the course of their evolution.
2. It provides a species' evolutionary history.

Ontogeny:

1. Ontogeny is the course of development of an individual organism.
2. It begins at the time of fertilization and includes all the developmental events at the time of birth and thereafter.

Parenchyma

1. Parenchyma is both phylogenetically and ontogenetically primitive because it is developed at the time of evolution.
2. It takes part in food synthesis and storage of food.
3. It is the simplest, most specialized and abundant permanent tissue.