Which condition is required for natural selection to occur?

There is inherited variation and a struggle to survive

When bacteria become resistant to an antibiotic over time, the antibiotic:

Selected for resistance that some bacteria already had

Molecular evidence (DNA and protein sequences)

Interbreed and produce fertile offspring

Domain, kingdom, phylum, class, order, family, genus, species

A variety of species and genes makes the ecosystem more resilient to change

12questions. Pick an answer and you'll see why right away.

Which condition is required for natural selection to occur?
When bacteria become resistant to an antibiotic over time, the antibiotic:
In evolution, the 'fitness' of an organism refers to its:
The forelimbs of a human, a whale, and a bat have the same bone arrangement but different functions. These are:
Which line of evidence for evolution is considered the strongest for measuring relatedness?
Two organisms are considered the same species if they can:
A river splits a population so the two groups can no longer interbreed, and over many generations they become separate species. This is:
Which list shows the taxonomic hierarchy from broadest to most specific?
In the scientific name Homo sapiens, the word Homo is the:
On a cladogram, two species that share the most recent common ancestor are:
Why does greater biodiversity tend to make an ecosystem more stable?
Which is the leading human cause of extinction?