B6 Flashcards
What are the negative results in deforestation
destroys habitats so less biodiveresity
leads to soild erosion
less of nutrients
what are the green house gasses
CO2
Water vapour
methane
How do humans effect biodiversity
making fields entirely one crop
building cities
deforestation
What is the indicator species for air pollution
lichen
how can lichen indicate the levels of pollution
bushy lichen = clean air
leafy lichen small amount of pollution
crusty more
None = Heavialy polluted
How does water pollution come happen?
discharge of harmful substances
indicator species
mayfly larva = very clean air
blood worm = modate pollution
none = heavy pollution
define food security
the accessability and quality of food
define sustainability
constant food production and availiability
proccess of genetic modification
cut gene out with restriction enzyme
cut section fo bacteria plasmid
use DNA ligase in order to stick the gene to the plasmid’s sticky ends together
binary fission
factors that affect health
genes
diet
exercise
types of pathogens
viruses
bacteria
fungi
protists
symptoms of HIV
white blood cells are attacked - little immune response
can lead to aids - no immunity
what are human defences against pathogens
stomach acid 2 pH - kills bacteria muhcus and hairs in respiritory system - traps bacteria skin = barrier eyes have tears to wahs out bacteria immune system
what is a vaccine
it contains dead or weakened pathogens for a specififc disease
allows immune system to develop antibodies for the pathogen