Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Natural Selection

Lecture 4: Bio141

QuestionAnswer
How do we end up with complex traits? 1. Each intermediate step on the way toward the evolution served as a function similar to the modern-day function. 2. Co-option of a trait to serve a new purpose.
Continually modifiable horizontal pupils create a broader panoramic view, more light from the ground.
Evolution as tinkering Not like an engineer, evolution is far from perfection, doesn't produce innovation from scratch, it works on what already exists.
Evolutionary Constraints Evolution lacks foresight
Nature of Variation Trade-offs and anatgonistic. Mutations are ranodom
Gene Flow into a local population can limit the degree of local adaption - gene flows from a larger population w/ different selective constraints.
Nature of Environment The biotic and abiotic environments are changing and evolving too
Changing climate, O2 etc: Predators adapt, prey evolves defenses, parasites evade defense
Coevolution changes in one species changes fitness of another species.
Evolution by Natural Selection is... a process of change
The process operates over time or generations True or False? True
Shape traits in a population leads to adaption
Taxonomy Naming, classification, organization of life - modern versions use shared features.
Carlos Linnaeus establishes hierarchial classification system with the publication of Systema Naturae in 1758
Linneaus' classification system was hiearchial - groups within groups
Systematic evolution and classification wedded
1942 - Ernst Mayr publishes Systematic and the origin of species
1966 - Willi Hennig publishes Phylogentic Systematics
Phylogeny Tells us the ancestry
Created by: exiong707673
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards