AP Biology 5.3 Essential Life Process Information
AP Biology 5.3 Essential Life Process Information. For what purpose to animals travel in packs, schools, or swarms?
|AP Biology||Essential Life Process Information|
|Test Prep||AP Biology|
For what purpose do animals travel in packs, schools, or swarms?
And here are the potential answers:
(A) To decrease gene flow (B) To increase the fitness of the individual
and the survival of the population (C) To increase genetic drift
(D) To decrease competition between species
First let's take a look at what happens when animals do hang out together. [Animals hanging out by a pool of water]
Well, animals that cooperate with each other are often more successful.
Take wolves, for example... [Two wolves walking in a forest together]
These two guys hang out together, they eat together, they play Xbox together…
Okay, fine, one of those things isn’t true. [Wolves playing Xbox together]
...They usually eat separately.
They’re part of a pack.
And being part of a pack can get you your next meal, or unlock some cool achievements [Wolves in a pack wearing wolf pack t-shirts]
when you play Call of Duty together.
And you don’t even have to be part of a blood thirsty, Xbox playing pack.
You could prefer hanging out with a school of fish and still end up with some sweet benefits. [A fish swimming with other fishes]
Y’know like...not being eaten.
So hanging out in groups can either help you find more food or avoid being food. [A pack of wolves with a plate of food]
Sounds like a pretty good way to increase your chances of survival.
Now let’s go back to the possible answers, starting with (A), to decrease gene flow.
Gene flow is the transfer of genes from one population to another.
It’s basically what happens when two groups randomly bump into each other and make more [Two birds bump into each other]
Which is also why we were terrified of bumping into anyone for a solid ten years of our life...and
may still have our protective plastic bubble in the garage... [Man rolling around in a plastic bubble]
So if you hang out in groups, you have a better chance of increasing gene flow, so the answer
can’t be A.
Now for answer B.
We already established that hanging out in groups increases survival, both in real life
and in Call of Duty.
And increased survival means that everyone in that group is ‘fitter’. [Wolves hanging out together]
Except for that one guy who swears by an exercise regime of lifting the remote control once
every two hours. [A wolf using the television remote]
So it looks like B is the correct answer.
But just for fun, let’s take a quick look at answers C & D.
C is all about increasing genetic drift.
We know that genetic drift is the change in frequency of a trait in a population.
Like trying to keep track of how many black sheep are in a flock over 10 years. [Man counting black sheep in a flock]
If only we didn’t keep falling asleep while we were counting them…
But we also know that that’s not what we’re looking for, so we can toss it out.
And we know we can eliminate D, “to decrease competition between species.”
Hanging out in groups has nothing to do with that. [Wolves in a pack eating together]
Seriously, ask our Call of Duty buddies.
No decrease in competition, there...
It all depends on which species are interacting, how large the groups are and so on…
And we can’t forget about resources and population densities and yadayadayayada...so
we can toss out D.
B is definitely our guy.
Now back to counting those sheep. [Man attempts to count black sheep]
This time we’re really going to do it, we’re...we’re….zzzzzzz