Using the evidence from the passage and reasoning, construct your own explanation of how the population of salamanders changed over time through natural selection. Include how genetic variation, adaptations and environmental conditions played a role.

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.

Molecules called lipids have long hydrocarbon chains that determine the way they act. they can be fats, oils, or hormones, and even exist in our cell membranes