Answer:
I believe its all of the above
The oxygen in the upper atmosphere combine to form ozone layer (o3) that allows to colonize surface water.
Explanation:
The fossil stomatolites are formed at about 3.0 ga laminated bacteria. they form the sediments to fall into a thin film of bacteria, these bacteria binds with the sediment and grows through it.
Cynobacteria uses water, CO2 and sunlight to create their own food and produce oxygen as a by product. The significance of stromatolites is that they are earliest fossil evidence life on earth.
They were first organism to photosynthesis and produce oxygen.
Answer : true
Explanation: the first choice is A
American Midwifery Certification Board (AMCB) is the organization that gives a midwife advanced certification.
<h3>What is American Midwifery Certification Board?</h3>
The American Midwifery Certification Board (AMCB) is the national certifying body for candidates in nurse-midwifery and midwifery.
So we can conclude that American Midwifery Certification Board (AMCB) is the organization that gives a midwife advanced certification.
Learn more about midwife here: brainly.com/question/5496881
