contestada

Select the correct statement about current hypotheses for the cause of the Cambrian explosion.
A.Oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible.
B. With the evolution of algae, oxygen was produced by oxygenic photosynthesis for the first time in the history of life on Earth.
C. Key developmental toolkit genes arose early in the Cambrian, leading to the Cambrian explosion of animal phyla.
D. There are no plausible hypotheses accounting for the rapid adaptive radiation known as the Cambrian explosion.

Respuesta :

Answer:

A. Oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible.

Explanation:

The Cambrian explosion was an event that happened approximately 541 million years ago and it lasted for about 13 – 25 million years.

The current hypothesis for the cause of the Cambrian explosion is that oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible.

Option A. is correct.

luisvaschetto

The statement 'oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible' is TRUE (Option A).

  • The Cambrian explosion refers to the extraordinary and sudden emergence of different life forms during the Cambrian period approximately 540 million years ago.

  • During this period, the emergence of photosynthetic organisms contributed to the change in the composition of the atmosphere.

  • The Cambrian explosion contributed to the appearance of many major phyla in different groups of animals.

In conclusion, the statement 'oxygen levels reached a critical threshold at the start of the Cambrian explosion, making the evolution of big, mobile animals possible' is TRUE (Option A).

Learn more in:

https://brainly.com/question/1140420

Otras preguntas