No. |
Tissue system |
Tissues present |
1. |
Epidermal tissue system |
Epidermis, trichomes, hairs, stomata |
2. |
Ground tissue system |
Parenchyma, collenchyma, sclerenchyma, mesophyll |
3. |
Vascular tissue system |
Xylem, phloem, cambium |
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Answer briefly:
(a) Why are villi present in the intestine and not in the stomach?
(b) How does pepsinogen change into its active form?
(c) What are the basic layers of the wall of alimentary canal?
(d) How does bile help in the digestion of fats?
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
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