The runner is a modified stem - Leaving Cert Biology - Question 4 - 2013
Question 4
The runner is a modified stem. How could you tell this from
1. external observation?
- You would observe buds or nodes on the runner, which indicate its function ... show full transcript
Worked Solution & Example Answer:The runner is a modified stem - Leaving Cert Biology - Question 4 - 2013
Step 1
1. external observation?
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
You would observe buds or nodes on the runner, which indicate its function as a stem. Additionally, the presence of leaves and stems along the runner further supports the identification as a modified stem.
Step 2
2. viewing a thin section of it under the microscope?
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
Under the microscope, you would see vascular bundles, confirming the structure as a stem, as these are not present in other plant parts like leaves.
Step 3
What term is used for the type of asexual reproduction that produced the daughter plant?
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
The term is vegetative propagation.
Step 4
Would you expect the daughter plant to be haploid or diploid?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Diploid. The daughter plant will have two sets of chromosomes, as it grows from the parent plant through mitosis.
Step 5
Explain your answer.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This occurs as a result of mitosis, which produces genetically identical cells to the parent, maintaining the diploid state.
Step 6
What evidence is there in the diagram that sexual reproduction has also taken place?
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The diagram shows fruits or (straw)berries or seeds, suggesting the process of sexual reproduction has occurred as seeds are produced through this method.
Step 7
Give one method, other than runners, and not involving seeds, that is used by horticulturists to produce new plants.
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
Cuttings or layering or grafting or micro-propagation or tissue culture.
Join the Leaving Cert students using SimpleStudy...
