91影视

The animals are eukaryotes that first originated in the Neoproterozoic era. These animals had small body structures without any skeletal tissues; that is, the initial animals were soft-bodied (termed). The change in environmental conditions and the passage of time led to the slow evolution of animals.

In the Cambrian age, prey animals developed protective measures such as an exoskeleton, and the predator animals evolved to locomote; these changes resulted in a new pattern of prey-predator relationship. The new relationship was favored by nature and led to the decline of Ediacaran fauna.

Thus, this statement contains an important factor related to the Cambrian explosion.

Therefore, the given option is false.

The atmospheric content of oxygen before the Cambrian period was relatively low, and the elevation in oxygen levels favored the diversification of animals and the emergence of organisms with greater body size and a higher rate of metabolism.

Thus, the Cambrian explosion was favored by increased levels of atmospheric oxygen.

Therefore, the given option is false.

The animals too evolved in marine habitat and slowly evolved to colonize land habitat. This modification was first observed by the emergence of arthropods in the Cambrian age, but it did not increase or decrease the diversity of animals. The explosion of animals occurred a little after land colonization.

Thus, the movement of animals onto and did not affect the Cambrian explosion to a large extent.

Therefore, the given option is true.

The structural as well as the physiological aspect of every organism, is influenced by genomic content. The emergence of Hox genes in the genome of new organisms favored diversification and resulted in the development of various animal groups.

Thus, Hox genes do influence the Cambrian explosion.

Therefore, the given option is false.