Most recent common ancestor of Aeshnidae and Cordulidae
Common ancestor of all lineage of dragonflies pictures
Most recent common ancestor of Macromildae and Cordulidae
Question 2
2.
Affects small populations more strongly
Happens by movement of individuals or gametes between populations
Usually increases genetic variation by introducing new alleles
Usually reduces genetic variation within a population
Happens by chance (random events like natural disasters or small population size)
Can affect populations of any size
Genetic Drift
Gene Flow
Question 3
3.
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.
Question 4
4.
How does independent assortment affect genetic variation?
Question 5
5.
What is the role of crossing-over in meiosis?
Question 6
6.
Why is diversity important in sexually reproducing populations?