Question

The greatest adaptive radiation of the animal kingdom occurred during the ______.

Options

• early Precambrian era

• late Precambrian era

• early Palaeozoic era

• early Mesozoic era

Answer 1

The greatest adaptive radiation of the animal kingdom occurred during the early Palaeozoic era.

Explanation:

The early Palaeozoic era witnessed a significant diversification of animal life known as the Cambrian explosion, marking the most extensive adaptive radiation. During this period, many major animal groups appeared and diversified rapidly in various ecological niches. This event greatly expanded the diversity of life forms on Earth and laid the foundation for the animal kingdom as we know it today.