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Common ancestor of all lineage of dragonflies pictures
Most recent common ancestor of Aeshnidae and Cordulidae
Most recent common ancestor of Macromildae and Cordulidae
Happens by movement of individuals or gametes between populations
Happens by chance (random events like natural disasters or small population size)
Usually increases genetic variation by introducing new alleles
Usually reduces genetic variation within a population
Affects small populations more strongly
Can affect populations of any size
Genetic Drift
Gene Flow
Complete the passage with the correct terminology:
Bacteria can become antibiotic resistant through . When you take antibiotics, the medicine kills most of the bacteria, but some bacteria might have random mutations that make them stronger and able to survive. These bacteria live on and start to reproduce, passing their resistance to their offspring. Over time, more of the bacteria in the population become resistant, making the antibiotic effective. This is why it's important to finish all your antibiotics — stopping too soon could leave behind the strongest bacteria, making infections harder to treat in the future.
How does independent assortment affect genetic variation?
What is the role of crossing-over in meiosis?
Why is diversity important in sexually reproducing populations?