Stem cells are present in ……………… .
A. Umbilical cord
B. Bone marrow
C. Adipose connective tissue
D. All of the above
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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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Stomata are enclosed by two A) secretory cells B) guard cells
B) guard cells
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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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The cells of stem which help in transpiration………..
The cells of stem which help in transpiration Stomata
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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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Distinguish between anatomy of dicot stem and monocot stem.
Anatomy of Dicot stem Anatomy of Monocot stem 1. Epidermis shows presence of multicellular trichomes. Epidermis is without trichomes. 2. Hypodermis is made up of collenchymatous cells. Hypodermis is made up of sclerenchymatous cells. 3. Medullary rays are...
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The tissue which is present in between xylem and phloem of stem is called
(C) vascular cambium
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Describe the types of stem tendrils present in different plants.
1. Stem tendrils: a. Tendrils are thin, wiry, photosynthetic, leafless coiled structures. b. They give additional support to developing plant. c. Tendrils have adhesive glands for fixation. d. Apical bud in Vitis quadrangularis gets...
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Assertion: Cancer is contagious and cells can spread from one person to other. Reason : Cancerous cells are highly differentiated cells.
Correct Answer - D (d)
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