mock

Question 1

1.1

Answer 1

change in gene

Question 2

1.2

Answer 2

mutation gives rise to variation, nature selects organisms who are best adapted, to survive and reproduce passing on desirable alleles

Question 3

1.3

Answer 3

3rd box- Wallace and Darwin

Question 4

1.4 (3)

Answer 4

• Hoverfly exhibit mimicry so they look like a wasp,
• predators think the fly is a wasp and do not attack as they dont want to get stung
• Overfly is eaten and survives

Question 5

2.1 (3)

Answer 5

• very little oxygen means aerobic bacteria cannot respire to decay material
• low pH means it is too acidic for decaying organisms to survive so no decay
• peat Boggs are waterlogged so prevents decay

Question 6

2.2

Answer 6

34g as only 10 percent passes to the next level

Question 7

2.3

Answer 7

DNA

Question 8

2.4

Answer 8

protein

Question 9

2.5 (3)

Answer 9

• destruction of habitats for plants
• peat used as a fertiliser so it gets decayed by decomposers on the farm releasing greenhouse gases which contribute to global warming so temp. increases
• peat burnt for fuel which releases greenhouse gases which contribute to global warming so temp. increases

Question 10

3.1 (3)

Answer 10

• using a better measuring device to get 10dm3 like a large measuring cylinder
• collect water ands then do not return the tadpoles before second collection
• collect at the same depth

Question 11

3.2

Answer 11

6

Question 12

3.3

Answer 12

line of best fit was a curve and they will give you ef

Question 13

3.4

Answer 13

36.7%

Question 14

3.5 (3)

Answer 14

• 02 concentration got too low
• tadpoles eaten by predators
• nutrients in pond were too low

Question 15

4.1

Answer 15

so seedlings are not affected by light intensity

Question 16

4.2

Answer 16

box 3 and box 4

Question 17

4.3

Answer 17

to make sure gravity is actually the thing affecting the growth root as B cancels out gravity

Question 18

4.5

Answer 18

it would go straight

Question 19

4.6 (2)

Answer 19

• auxins inhibit root growth
• so auxins gather on the lower side of the root going straight and then down and the ink lines should have more space between them than the original as they have elongated

Question 20

4.7

Answer 20

weed killers, rooting powder, promoting growth in root cultures

Question 21

4.8

Answer 21

• increase fruit size
• promote flowering

Question 22

5.1

Answer 22

• hold the ruler right above the hand
• repeat experiment many times and calculate the mean

Question 23

5.2

Answer 23

endocrine system is slower

Question 24

5.3

Answer 24

thyroxine

Question 25

5.4

Answer 25

insulin/glucagon

Question 26

5.5

Answer 26

increased heart rate and breathing and rate of respiration

Question 27

5.6 (4)

Answer 27

• oral pills which contain oestrogen to inhibit FSH so the egg cannot mature and get fertilised
• injection which releases progesterone which inhibits FSH and LH so no maturation of eggs and release of eggs so no eggs can be fertilised
• IUD releases hormones which stop maturation and release of eggs… INFERTILITY
• FSH/LH are injected which promote egg maturation and release so eggs can be collected and fertilised and put back into the female once it is a viable embryo

Question 28

6.1

Answer 28

an allele which iOS always expressed even if only one copy is present

Question 29

6.2

Answer 29

if they were homozygous dominant which is DD then all children would have the condition but child 5 doesn’t

Question 30

6.3

Answer 30

person 6 is Dd and person 7 is dd - 50% will have the condition

Question 31

6.4 (3)

Answer 31

• CF is caused by the recessive allele
• so people need 2 alleles to have CF
• if 1/50 people have one allele then if you have both recessive alleles that is a 1/50 x 1/50 chance

Question 32

7.1 (5)

Answer 32

• 0.8 x 16 = 12.8MJ/kg
• 46/12.8 = 3.59375kg
• 3.59375 x 1000 = 3593.75kg
• 10,000m2 = 16400kg
  x = 3593.75kg

Question 33

7.3

Answer 33

11:21

Question 34

7.4 (3)

Answer 34

• everted as faeces
• lost as CO2 or H2O in respiration
• lost as urine

Question 35

7.5

Answer 35

first box

Question 36

7.6

Answer 36

Leucine can be made by chickens from other substances in food

Question 37

8.1 (2)

Answer 37

• regulation of internal conditions
• in response to internal and external stimuli

Question 38

8.2 (2)

Answer 38

• protein - too big to be filtered into the kidneys glucose - gets filtered into kidney from the blood and all gets reabsorbed back into blood
• urea gets filtered into the kidneys from the blood and none gets reabsorbed back and all goes to the bladder