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

topic 7

QuestionAnswer
What is a disturbance? event that alters a community or resource availability
What are examples of disturbances? fires, storms, droughts, human activity
What is ecological succession? orderly change in species composition over time
What is primary succession? succession on newly lifeless surface
What is secondary succession? succession after disturbance leaving soil intact
What are pioneer species? first species to colonize disturbed areas
What is an example of a pioneer species? lichens or mosses
What does succession increase? biodiversity and soil nutrients
What are abiotic changes during succession? soil depth and nutrients increase
What is a geological event? earthquake or volcano
What is a meteorological event? hurricane, flood, or drought
What do volcanoes do? destroy and later enrich soil
What do earthquakes cause? split habitats or create new barriers
What do hurricanes affect? coastal habitats
What does drought trigger? migration or adaptation
What is biomagnification? increasing toxin concentration in higher trophic levels
What is eutrophication? excess nutrients cause algal bloom and oxygen loss
What nutrients cause eutrophication? nitrogen and phosphorus
What is an algal bloom? rapid algae growth depleting oxygen
What are dead zones? areas with little or no oxygen
What are toxins’ effects in biomagnification? accumulate in tissues of top predators
What is the result of eutrophication? aquatic life death due to oxygen depletion
What can human activity cause? pollution and ecosystem imbalance
What is heterozygote advantage? heterozygotes have higher fitness
What causes genetic variation? mutations
Do environmental changes create mutations? no, they act on existing ones
What influences mutation frequency? selection pressure
What is fitness? ability to survive and reproduce
What drives natural selection? environmental change
What maintains genetic diversity? variation and balanced selection
What increases mutation rate? radiation or chemicals
Created by: aayush123654
 

 



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