More useful cards

Question 1

Which flask does exhaled air pass through

Answer 1

flask b as mouthpiece connected to long tube in flask b
cannot inhale from flask b because lime water would get sucked in

Question 2

Describe role of diaphragm and intercostal muscles during inhalation

Answer 2

Diaphragm contracts
It flattens and moves down
Intercostal muscles contract so rib cage moves out
Volume of thorax increases
Pressure of thorax decreases

Question 3

Describe role of diaphragm and intercostal muscles during exhalation

Answer 3

Diaphragm relaxes
It moves up and domes
Intercostal muscles relax so rib cage moves in
Volume of thorax decreases
Pressure of thorax increases

Question 4

Tell me structure of insect pollinated flower

Answer 4

Stamens enclosed in flower
Stigma enclosed with flower and sticky
Petals large and brightly coloured
Nectaries present with sugary liquid to attract insects

Question 5

Tell me structure of wind pollinated flower

Answer 5

Stamens exposed outside of flowers
Stigma exposed outside of petals and feathery
Petals are smaller and green
Nectaries are absent

Question 6

One natural method plants use to reproduce asexually

Answer 6

runners

Question 7

One artificial method a plant grower may use to reproduce asexually

Answer 7

cuttings

Question 8

Why plant grower would choose to reproduce a plant asexually rather than sexually

Answer 8

No genetic variation - produce a clone
Faster to reproduce

Question 9

Explain how bacteria that produce enzyme cellulase in appendix and large caecum help a rabbit with their diet

Answer 9

Plants contain cellulose
Which is digested by cellulase enzyme
Into glucose
So energy is released via respiration

Question 10

Why do humans have small caecum and appendix

Answer 10

Humans don’t digest cellulose
Humans are omnivores

Question 11

Why does having no appendix increase likelihood of infections in colon

Answer 11

Removes USEFUL bacteria
Reduces competition
So pathogenic bacteria survive

Question 12

Why can’t plants absorb all light energy

Answer 12

Some light is reflected
Light does not fall on chloroplasts

Question 13

What is meant by reflex response

Answer 13

Automatic action without thinking

Question 14

How might a lack of nitrates affect plant growth

Answer 14

Less amino acids + proteins made
So stunted growth

Question 15

How might a lack of magnesium affect plant growth

Answer 15

Less chlorophyll made so leaves turn yellow

Question 16

What is meant by recessive allele

Answer 16

Only expressed if no dominant allele present

Question 17

Name 2 substances in phloem

Answer 17

Amino acids
Sucrose

Question 18

Explain how pests feeding on phloem can lead to reduction in yield

Answer 18

Less respiration
Less ATP
Less minerals ABSORBED
Less sucrose + amino acids
Less photosynthesis
Pests can spread disease and infection