The Five Kingdom classification system was used until the invention of (1 point)

Question

• the microscope.
• DNA sequencing.
• the scientific method.
• genes.

Answer 1

The Five Kingdom classification system was used until the invention of DNA sequencing. DNA sequencing provided new insights into genetic relationships among organisms, leading to more refined classification systems, such as the three-domain system proposed by Carl Woese.

Answer 2

Which change would create a new ecosystem?
• an introduced species
• a lake freezing over
• a dam flooding a valley
• a yearly migration

Answer 3

A dam flooding a valley would create a new ecosystem. This action alters the physical landscape, potentially leading to the formation of a new aquatic habitat, changes in species composition, and shifts in ecological interactions. Introduced species can affect existing ecosystems but do not necessarily create a new one. Similarly, a lake freezing over may change conditions temporarily without creating a new ecosystem, and yearly migration involves changes in species distribution but does not lead to new ecosystem formation.