Cell walls of xylem cells are thick because
A) Suberin
B) Peetin
C) Cellulose
D) Lignin
1 Answers
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Some animals have thick fur and thick skin to protect themselves from cold.
Answer is (C) Tundra
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Which of the following statement is not correct? i) All cells arise from the same cells. ii) Vacuoles are the power houses of the cell.
Correct option is B) ii, iii
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i) All living organisms are composed of cells and products of cells, ii) All cells arise from preexisting cells.
C) Cell theory
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Gum is secreted by A) Dermal layer B) Meristematic cells C) Xylem D) Phloem
A) Dermal layer
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Identify the xylem element. A) Trachieds B) Sieve cells C) Sieve tubes D) Companion cells
(A)Trachieds Xylem elements are - Trachieds, vessels, xylem fibre and xylem parenchyma
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Identify the xylem element. A) Trachieds B) Sieve cells C) Sieve tubes D) Companion cells
2 Answers
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Bark is impervious to gases and water because the walls are made up of ………………
Correct option is B) Suberin
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Arteries have thick elastic walls but viens do not need thick wall.
Because arteries need to carry pressurised blood from the heart all throughout the body it has to be pressurized to stop back flow of blood into the heart veins carry...
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a. How are the hybridoma cells selected from the culture of B-cells and Myeloma cells while fusing them in hybridoma technology?
a. Using HAT medium b. Monoclonal antibody which is used to treat early stages of breast cancer is Herceptin (trastuzumab). It works by attaching itself to HER2 receptors by blocking them from...
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Which of the following tissues is with dead thick-walled cells without intercellular spaces?
(C) sclerenchyma
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