The meristematic tissue responsible for the increase in the length of the plant is: MCQ with Answer and Explanation

The meristematic tissue responsible for the increase in the length of the plant is:
A. Both B and C
B. Lateral meristem
C. Intercalary meristem
D. Apical meristem
Answer: Option A
Solution (By JKExamLibrary)
Apical meristems at root and shoot tips contribute to primary growth (increase in length). Intercalary meristems, located at nodes and leaf bases, also aid in elongation, especially in grasses. Lateral meristems (vascular cambium, cork cambium) cause secondary growth (increase in girth). So both apical and intercalary meristems are responsible for length increase.

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Practice More Biology Questions

Question #1
Which of the following is a cartilaginous fish?
A. Hippocampus (seahorse)
B. Scoliodon (dogfish)
C. Rohu
D. Catla

Correct Answer: Option B


Explanation:
Scoliodon is a cartilaginous fish (Chondrichthyes), possessing a cartilaginous endoskeleton, placoid scales, and ventral mouth. Rohu and Catla are bony fishes (Osteichthyes). Hippocampus is also a bony fish. Chondrichthyes include sharks, rays, and skates. They lack an air bladder and have to swim constantly to avoid sinking.

This question belongs to: Science Biology
Question #2
The type of tissue that covers body surfaces and lines cavities is:
A. Nervous tissue
B. Connective tissue
C. Epithelial tissue
D. Muscle tissue

Correct Answer: Option C


Explanation:
Epithelial tissue forms sheets covering external surfaces (skin) and lining internal organs and cavities. It functions in protection, absorption, secretion, and sensation. Connective tissue supports and binds, muscle contracts, nervous transmits impulses. Epithelial cells are tightly packed with little extracellular matrix.

This question belongs to: Science Biology
Question #3
In plant physiology, the 'Osmotic pressure' is the pressure that must be applied to a solution to prevent the inward flow of water across a semipermeable membrane. It is directly proportional to the:
A. Volume of the solution
B. Temperature only
C. Concentration of solute particles
D. Size of the solute molecules

Correct Answer: Option C


Explanation:
Osmotic pressure (OP) is a colligative property of a solution, meaning it depends on the number of solute particles dissolved in a given volume of solvent, not on the nature or size of the particles. It is defined as the hydrostatic pressure that must be applied to a solution to prevent the net flow of water (osmosis) into the solution across a semipermeable membrane. According to the van't Hoff equation, osmotic pressure is directly proportional to the molar concentration of solute particles and the absolute temperature. The more concentrated the solution, the higher its osmotic pressure.

This question belongs to: Science Biology