Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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
share
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

BIOLOGY

UNIT 3 KA 5-6

QuestionAnswer
What is a Fertilisers? Fertilisers are chemical that are applied to plants to encourage growth & increase their yield.
What is a problem a fertiliser can cause? Algal bloom.
What is Eutrophication? Eutrophication is a serious problems caused by water pollution.
What is Pesticides? A pesticide is a substance used to prevent, destroy or repel pests.
What are the different types of Pesticides? Insecticides - Herbicides - Fungicides
What is a problem Pesticides can cause? Pesticides sprayed on crops can be accumulate in the bodies of organisms over time. This can lead to death levels.
What can Genetically modified crops can be used to do? Increase crop yield - Reduce the use of fertilisers - Reduce the use of pesticides
Examples of GM Crops? Golden rice - GM Tomatoes
What is a Biological control? Biological control involves using organisms such as natural predators or parasites to control pest numbers.
What is Mutations? Mutations is a random change to genetic material.
What is an allele ? Different form of the same gene
Why is variation important? makes it possible for a population to involve over time in response to changing environmental conditions
What is an adaptation? An adaptation is an inherited characteristic that makes an organism well suited to survival in its environment
What is an example of an adaptation? Camel's have two sets of eyelashes to help keep out the sand
What is Natural selection? This is when every species of living organisms have an enormous reproductive potential
What are the 3 selection pressures? Predation - Disease - Food available
What is Speciation? Is the Formation of a new species (occurs after a part of the population becomes isolated)
What can an Isolation barrier be? Geographical- Rivers/deserts/Sea Ecological- Differences in Temp/Humidity or PH
What are the 4 steps that lead onto one another? Isolation - Mutation - Natural Selection - Different Species Formed
Created by: Emilylogue67
 

 



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