Indicate the correct designation of the paired sex chromosomes.

Which of the following is an advantage of solar energy?

Classify the structures as homologous or analogous, depending on their structure and function.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen