Changes in human and parrot populations over 500 years - NSC Life Sciences - Question 3 - 2017 - Paper 1
Question 3
Changes in human and parrot populations over 500 years.
The table below shows various food groups with waste costs.
- Increase in human numbers, this food wastage ... show full transcript
Worked Solution & Example Answer:Changes in human and parrot populations over 500 years - NSC Life Sciences - Question 3 - 2017 - Paper 1
Step 1
3.1.1 - To allow time for the auxins from the tip
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The auxins need sufficient time to diffuse from the shoot tip into the agar jelly. This process is crucial for observing their effects on plant growth.
Step 2
3.1.2 - Auxins from the agar jelly
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The auxins should diffuse unevenly, causing more auxins to be retained on one side, leading to growth on that side, while the opposite side grows more slowly.
Step 3
3.1.3 - Remove the agar jelly completely
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To investigate the effect of auxins, it is important to completely remove the agar jelly or to use agar jelly that does not contain auxins. You may need to place a black box around the tip of the coleoptiles.
