Predicted

Question 1

when the new three-domain system was introduced dogs were classified into eukaryotic
-explain how the three domain system was developed

Answer 1

1. based on DNA and biochemical evidence
2. prokaryotes split into twos groups
3. archaea primitive/ simple bacteria
4. prokaryotic/ bacteria true modern bacteria
   5.eukaryotic includes (protistts, fungi) plants and animals

Question 2

Give two pieces of evidence that scientists can use to show that dogs are closely related?

Answer 2

-fossils
-dna
-similarties in structure

Question 3

give one reason why using binomial names?

Answer 3

-same name used by everyone
-genus gives information on ancestry

Question 4

advantages and disdavtages of sexual reproduction?

Answer 4

-gentic variability
-better survival/ more suited

–hard to find organisms to reproduce with
-not all dan is passed on

Question 5

adavatges and disadaavtegs of asexual reproduction?

Answer 5

-no need to find mate
-all dan passed on

-gentically vulnerable
-not as suited to environment

Question 6

why are people against gm?

Answer 6

-possible harm to humans when eaten
-damadeg to food cahins
-genes may spread to the wild
-untural

Question 7

why is deformation more common in tropical regions?

Answer 7

-incrase human pop
-incarses standard living
-so more food/ fuel needed

Question 8

sugest a reason for incase in wildfires?

Answer 8

-global warming
-less rain/more droughts

Question 9

why is energy lost at each trophic level?

Answer 9

1-materail lost in waste
2-dont eat all the matter

Question 10

why is DNA a polymer?

Answer 10

-made up of reapeating units called nucleotides
-joined and bonded together

Question 11

two ways to reduced the chance of resistance antibiotics?

Answer 11

-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

Question 12

two example of automatic responses?

Answer 12

-blinking
-pupil dilating
-sneezing
-pupil dilating

Question 13

what hormone stimulates ovulation?

Answer 13

LH

Question 14

What two hormones produced by pituitary galnd?

Answer 14

LH
FSH

Question 15

How is a sperm cell adapted for its purpose of fertilseing?

Answer 15

-lots mitrocndria to realise energy or transfer energy
-tail to swim to egg