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.
Well the order. of the food chain starts with Sun then producers (plants) soak that in and consumers eat producers and then decomposes take down consumers when they die and returns it to the soil. it all starts with the Sun.
<span>The fertilized egg is called zygote. Then a few weeks later on, it is called an embryo.</span>
Answer:
14 is the top one if im not mistaken and 15 is the third one if im not mistaken
Explanation:
Te answer is False. T<span>ension and relaxation are mutually exclusive--it is not possible to be relaxed and tense at the same time. R</span>elaxation of the body through decreased muscle tensions will, in turn, decrease mental tension. It is <span>Edmund Jacobson's who showed us Progressive Relaxation Technique.</span>
