The 3-Domain, 6-Kingdom classification system has only been used for a few decades. The original scheme did not include the classification level of “Domain”, but this level was added after scientists discovered new unicellular prokaryotes. Why were these new organisms placed in the Domain Archaea, instead of being included in the Domain Bacteria? Group of answer choices

They can’t live in extreme environments

They were not single-celled.

They had a membrane-bound nucleus

They were older and structurally different than other prokaryotes.

Some heterozygous alleles create variations in expression so that there is not a clear dominant or recessive allele. question 1 options: true false

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.