What did Darwin’s studies of the finch help him to realize?
He recognized that genetic variations occur over time.
What is a mutation and how does one occur?
A change in an organism’s DNA; because of an error in mitosis or meiosis, or when genes combine during reproduction.
How can the variations among the beaks of these birds be explained? Support your answer with an example.
Wow, you really know your stuff! / Sorry, we were looking for...
What will happen if a trait does not favor survival?
It won't be passed on to offspring.
What causes bacterial resistance?
When bacteria develop defenses against medicines they've been exposed to.
What is the job of an antibiotic?
Kills disease-causing bacteria without harming the host.
When does natural selection occur?
When the organisms that are best suited to their environments survive and reproduce successfully.
How can organisms ensure that their offspring continue?
Produce more offspring than their environments can support.
How can an animal’s coloring affect its chances of survival?
Camouflage.
How can people help prevent bacterial resistance? Name two ways.
Don't take antibiotics you don't need, don't share them, don't use leftovers, follow instructions carefully, practice good hygiene, etc.
