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Flashcards in B3 Deck (21):
1

what is the nitrogen cycle?

2

What is the carbon cycle?

3

What id the evidence for evolution?

-fosils that have been discovered share similarities with other animals

-DNA in animals is nearly the same as close relatives

 

4

How does evolution work?

An example of natural selection is:

Where cows have short and long legs

Cows with small legs are eaten by predators, leaving cows with long legs, meaning that the cows will evolvle to have long legs

5

What was Lamarck's theory of evolution?

He believed an animal had a characteristic which they inhierited from their parents, such as a giraffe that has a long neck because their ancestors had them.

6

Key words to use

Variation- diversity of species 

Adapted-adjusted or evolved to their environment

Interdependence- everything depends on each other

7

what is mutation?

This is where DNA does not copy corectly causing variation

8

What is selective breeding?

Selective breeding is where humans choose charcteristics of dio give a different plants or animals to combine to give a desired result. this is articial

9

How do we feel?

10

What is a stimulus from the nervous system?

It is quick

short lasting

11

What is a hormonal stimulus?

This takes longer to come into effect

lasts longer

12

An nervous stimulus

Touch stimuli

Thoughts

13

Hormonal stimuli

ADH controling water balnce in the body

Insulin controling sugar levels

14

How are organisms linked in a food web?

this is where every element is dependent on each other.

15

What is the formula for energy transfer?

energy in tissues diveded by energy in food eaten

times 100

16

What are non-living indicators of environmental changr?

carbon dioxide levels

temperature

nitrate levels

17

What are living indicators of environmental change?

Levels of phytoplankton

lichens 

mosslevels 

animal populations

18

What is extinction?

Thie occurs when an organism can not adjust to environmental changes like an introduction of a new species unnaturally

19

Why is biodiversity important?

It allows more complex food webs to exist which is the rainforest for example, which provides most of our worlds medicines

20

How do we maintain biodiversity?

Limit exticntion

encourage variatin

limit selective breeding

21

How do we increase sustainibility

Increase biodiversity

Saving energy

form communal groups and share resources

implement biodegradable packaging