Answer any two of (a), (b), (c) - Leaving Cert Biology - Question 14 - 2006
Question 14
Answer any two of (a), (b), (c).
(a) The diagram shows the structure of part of a stem.
(i) Identify A, B, C and D.
(ii) What is a meristem?
(iii) Give a location ... show full transcript
Worked Solution & Example Answer:Answer any two of (a), (b), (c) - Leaving Cert Biology - Question 14 - 2006
Step 1
Identify A, B, C and D.
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
A = terminal or apical bud, B = leaf scar, C = scale, girdle, or growth scar, D = lateral or axillary bud.
Step 2
What is a meristem?
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
A meristem is a region of plant tissue consisting of undifferentiated cells capable of division and growth, responsible for new growth.
Step 3
Give a location of a meristem in the diagram. Explain your answer.
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 meristem is located at the tip of the stem, indicated by the apical bud (A). This location allows for vertical growth of the plant.
Step 4
How many years' growth are shown in the diagram? Explain your answer.
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
The diagram shows two years' growth as indicated by the two distinct growth rings visible in the stem structure.
Step 5
Give two functions of a stem.
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
The stem transports water and nutrients from the roots to the leaves. 2. It provides support for leaves and flowers, allowing them to reach sunlight.
Step 6
Identify tissues A and B.
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
A = xylem, B = phloem.
Step 7
To which tissue type do A and B belong?
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
Both A (xylem) and B (phloem) belong to vascular tissue.
Step 8
Identify cells L and M and part N in tissue B.
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
L = companion cell, M = sieve tube, N = sieve plate.
Step 9
Name a substance transported in tissue A.
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
Water and dissolved mineral nutrients are transported in tissue A (xylem).
Step 10
Name a substance transported in tissue B.
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
Glucose or amino acids are transported in tissue B (phloem).
Step 11
Tissue A has another function in addition to transport. What is this other function?
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
Tissue A (xylem) also provides structural support for the plant.
Step 12
Where in a young root would you find tissues A and B?
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
In a young root, tissues A (xylem) and B (phloem) can be found in the center of the root, forming a vascular bundle.
Join the Leaving Cert students using SimpleStudy...
