Front

What is the best evidence that two organisms share a common evolutionary ancestry?

Back

Significant genetic similarity between the two organisms.

Front

What can be concluded about the evolution of land plants based on the phylogenetic tree?

Back

Seedless vascular plants evolved before gymnosperms and angiosperms.

Front

How can biochemical similarities be used to determine evolutionary relatedness?

Back

By comparing gene sequences, we can identify which species are most closely related.

Front

Why do antibiotics lose their effectiveness over time?

Back

Some bacterial variants can survive and reproduce, leading to antibiotic resistance.

Front

What might happen to the moth population over time if lighter-shaded moths are less fit?

Back

The lighter-shaded moths will be selected out of the population.

Front

Define evolution.

Back

Evolution is the process by which species change over time through genetic variation and natural selection.

Front

What is natural selection?

Back

Natural selection is the mechanism by which individuals with favorable traits are more likely to survive and reproduce.

Front

What is a phylogenetic tree?

Back

A phylogenetic tree is a diagram that shows the evolutionary relationships among various biological species.

Front

What role do fossils play in understanding evolution?

Back

Fossils provide evidence of past life forms and their changes over time, helping to trace evolutionary history.

Front

What is genetic drift?

Back

Genetic drift is a change in allele frequencies in a population due to random sampling of organisms.