find the angle bw stem and petiole of 6 diff kinds of leaves
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Apical meristem – Tissues at the tip of a stem capable of cell division, gives rise to stem elongation.
Epidermis – Outer layer of wax-coated cells that provides protection and covering.
Cortex – Primary tissues of a stem externally bound by the epidermis and internally by the phloem.
Vascular bundle
Xylem tissues – Distribute water and minerals from the roots up through the plant. Xylem provides the structural support in plants, becoming the “woody ” tissue.
Cambium tissues are the single-celled layer of meristematic (dividing) tissues that continually divides to form phloem tissues toward the outside and xylem tissues toward the inside. Cell division of the cambium tissue adds width to the stem.
Phloem tissues (inner bark) – distribute sugars (products of photosynthesis) throughout the plant. It is important to understand what happens when the phloem is blocked, as when a tree is girdled with a tie or rope. The stem often enlarges just above the blockage due to the sugars moving down from the leaves for distribution throughout the plant. Tissues below the blockage slowly starve. Roots die back, eventually leading to death of the plant.
Pith – Center of dicot plant stems. In some plants the pith breaks down forming a hollow stem. In older woody plants, the pith is filled with rigid xylem wood fiber.
Epidermis – Outer layer of wax-coated cells that provides protection and covering.
Cortex – Primary tissues of a stem externally bound by the epidermis and internally by the phloem.
Vascular bundle
Xylem tissues – Distribute water and minerals from the roots up through the plant. Xylem provides the structural support in plants, becoming the “woody ” tissue.
Cambium tissues are the single-celled layer of meristematic (dividing) tissues that continually divides to form phloem tissues toward the outside and xylem tissues toward the inside. Cell division of the cambium tissue adds width to the stem.
Phloem tissues (inner bark) – distribute sugars (products of photosynthesis) throughout the plant. It is important to understand what happens when the phloem is blocked, as when a tree is girdled with a tie or rope. The stem often enlarges just above the blockage due to the sugars moving down from the leaves for distribution throughout the plant. Tissues below the blockage slowly starve. Roots die back, eventually leading to death of the plant.
Pith – Center of dicot plant stems. In some plants the pith breaks down forming a hollow stem. In older woody plants, the pith is filled with rigid xylem wood fiber.
krissh1223456789:
actually i want my answer in diagram ... would u plz???
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Step-by-step explanation:
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. A petiole is the stalk that supports a leaf to the stem of a plant. The angle between petiole and stem for various types of leaves will be as follows. By observing this we find the angles are less than 90 degree and so are Acute angles
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