Predicted Flashcards
when the new three-domain system was introduced dogs were classified into eukaryotic
-explain how the three domain system was developed
- based on DNA and biochemical evidence
- prokaryotes split into twos groups
- archaea primitive/ simple bacteria
- prokaryotic/ bacteria true modern bacteria
5.eukaryotic includes (protistts, fungi) plants and animals
Give two pieces of evidence that scientists can use to show that dogs are closely related?
-fossils
-dna
-similarties in structure
give one reason why using binomial names?
-same name used by everyone
-genus gives information on ancestry
advantages and disdavtages of sexual reproduction?
-gentic variability
-better survival/ more suited
–hard to find organisms to reproduce with
-not all dan is passed on
adavatges and disadaavtegs of asexual reproduction?
-no need to find mate
-all dan passed on
-gentically vulnerable
-not as suited to environment
why are people against gm?
-possible harm to humans when eaten
-damadeg to food cahins
-genes may spread to the wild
-untural
why is deformation more common in tropical regions?
-incrase human pop
-incarses standard living
-so more food/ fuel needed
sugest a reason for incase in wildfires?
-global warming
-less rain/more droughts
why is energy lost at each trophic level?
1-materail lost in waste
2-dont eat all the matter
why is DNA a polymer?
-made up of reapeating units called nucleotides
-joined and bonded together
two ways to reduced the chance of resistance antibiotics?
-dont give for mild infections because they ill get better due body immune system
-dont use for viral infections becaus eantboitics don’t kill viruses
-finish the whole course so no bacteria is left to develop resistant strains
two example of automatic responses?
-blinking
-pupil dilating
-sneezing
-pupil dilating
what hormone stimulates ovulation?
LH
What two hormones produced by pituitary galnd?
LH
FSH
How is a sperm cell adapted for its purpose of fertilseing?
-lots mitrocndria to realise energy or transfer energy
-tail to swim to egg