Question
The diagrams show a section through a root and a section through a stem.
In which tissues are amino acids transported?
A 1 and 3
B 1 and 4
C 2 and 3
D 2 and 4
▶️Answer/Explanation
Ans A
The correct answer is A, because :
Amino acids are the basic units of proteins and they are essential for plant to survive.
Amino acids are generally transported through phloem tissue, in both roots and stem.
In given, diagram phloem is represented in 1 and 3 (as per cross section of root and stem).
Question
Which structure or substance is found in a plant root?
A dentine
B platelet
C ventricle
D xylem
▶️Answer/Explanation
Ans D
The correct answer is D, because :
In a plant root, its function is to absorb and transport water, minerals from soil to plant.
Whereas,
- Dentine is found in tooth
- Platelets are blood cells present in blood
- Ventricle is the chamber of heart in its structure
Question
Which row describes transport in a plant?
▶️Answer/Explanation
Ans: A
The correct answer is A, because :
Xylem is found in vascular bundle and it transports water and mineral ions.
Phloem is found in vascular bundle and it transports sucrose and amino acids.
As per these information, and on matching it with above table the answer becomes A.
Question
The roots of a plant were placed in a solution of red dye. After 24 hours, a section of root and a section of leaf were cut from the plant.
In which tissues will the red dye be visible?
(A) P and R
(B) P and S
(C) Q and R
(D) Q and S
▶️Answer/Explanation
Ans : C
The correct answer is C, because ;
Red dye solution is mixture of red dye and water, on leaving it for 24 hours means
The red dye water is transported to other parts of plants and it it transported by xylem.
As per cross sections of root and leaf, then the xylem is found at Q and R.