lesson 1

Question 1

biodiversity defenition

Answer 1

number of different secies within an area

Question 2

protected species defenition

Answer 2

species which is at serious risk of extinction

Question 3

what is the defenition of extinction

Answer 3

complete loss of a species

Question 4

how many reasons for being endangered?

Answer 4

6

Question 5

what are the 6 reaosns why they can become endangered

Answer 5

natural selection
non-contiguus populations
loss of habitat
overhunting byhumans
competition
pollution

Question 6

natural selection as a factor of going endangered

Answer 6

individuals less suited to prevailing conditions reproduce less succesfully - numbers decrease

Question 7

non-contiguous populations as a factor of going endangered

Answer 7

populations which are too small with insufficient genetic diversity to ensure increase in numbers

Question 8

loss of habitat examples

Answer 8

deforestation, loss of hedgerows

Question 9

loss of habitats as a factor of going endangered

Answer 9

eg hedgerows gotten rid of
gets rid of corridors

Question 10

over hunting by humans as a factor of going endangered

Answer 10

trophy hunting
traditional medicinial practises
overfishing

Question 11

2 types of competition

Answer 11

interspecific (diff)
intraspecific (same)

Question 12

competiton as a factor of going endangered

Answer 12

interspecifc - 2 diff species
intra - same species

Question 13

pollution as a factor of going endangered

Answer 13

due to human activity eg oils and PCBs

Question 14

what are PCB’s

Answer 14

neurotoxins
carcinogens
homrone disruptors

Question 15

conservation defenition

Answer 15

planned protection, perservation, managment and restoration of natural habitats

Question 16

aim of conservation

Answer 16

maintain species and genetic biodiversity

Question 17

whats the amount of ways to sort out conservation

Answer 17

11

Question 18

whats the 11 ways of looking after conservation

Answer 18

protecting habitats - sssi
CITES
Gene + Sperm banks
Seed Banks
Breeding programmes
Rare breed societies
Species reintroduction
International organisation
Legislation
Ecotourism
Pollution Control

Question 19

significance of protecting habitats in conservation

Answer 19

SSSIs

Question 20

significance of CITES in conservation

Answer 20

internation co-operation in restricting trade of endangered species

Question 21

significance of breeding programmes in conservation

Answer 21

zoos
botanic gardens

Question 22

significance of international organisations in conservation

Answer 22

organise publicity to educate and increase public awareness

Question 23

significance of legaslation in conservation

Answer 23

prevent overfishing
poaching
collecting birds eggs

Question 24

why is biodiversity good

Answer 24

source of new crops for agriculture
new pharmaceuticals for medicine

Question 25

what does biodiversity provide (genetically)

Answer 25

diversity of alleles

Question 26

whats the 4 good things of conversation

Answer 26

ethical reasons genetic diversity agriculture + horticulture medicinal properties

Question 27

whats the main thing of agricultural exploitation

Answer 27

intensive farming increase in chemical ferilisers pesticides herbicides larger fields less hedgerows

Question 28

what does larger fields lead to

Answer 28

less hedgerows grow monocultures

Question 29

what are monocultures

Answer 29

single crop grown on massive scale

Question 30

why are monoculturs crap

Answer 30

one type of habitat only reduce soil fertility

Question 31

how does monocultures reduce soil fertility

Answer 31

roots grow to the same length and extract minerals from the same depth - increases need for chemical fertilisers also more susceptible to same pests and diseases - needs more pesticides

Question 32

monoculture defeintion

Answer 32

growth of large numbers of genetically identically crop plants in an area

Question 33

pesticides defenition

Answer 33

include chemicals which kill / ihibit growth of weeds, fungi and insects

Question 34

what do chemcial fertilisers contain

Answer 34

NPK to increase plant growth

Question 35

what can chemcial fertilisers do

Answer 35

cause eutrophication

Question 36

what can overgrazing cause

Answer 36

soil compaction reducing air spaces leading to loss of soil feritlity. Water unable to penetrate compacted soil

Question 37

why is deforastation happening

Answer 37

cleared to grow food and rear livestock

Question 38

what cases soil erosion

Answer 38

succesion

Question 39

why is succession crap

Answer 39

leads to soil erosion tree seedlings cannot become established and area becomes a desert

Question 40

what is desterification

Answer 40

turns to desert due to soil erosion

Question 41

5 things deforistation can lead to

Answer 41

destruction of habitat decreased biodiversity soil erosion diminishment in soil quality

Question 42

whats the link of soil erosion and deforistation being bad

Answer 42

tree rots bind soil tog heavy rain sweep exposed topsoil down to the floodplain below whats left is not suitable for growth

Question 43

what does deforistation of uplands cause

Answer 43

lowlands flooding

Question 44

why is water vapour evaporation annoying (deforistation)

Answer 44

slower process than transpiration so soil becomes wetter water fills airspaces so oxygen for roots decrease

Question 45

germination and wet soil (deforistation)

Answer 45

longer for wet soil to warm up germination and root activity reduced

Question 46

what does cold damp soil grow (deforistation)

Answer 46

favours growth of denitrifying bacteria so soil looses fertility