Can you please help me with a simple and short answers please. Also no meed for
ID: 203341 • Letter: C
Question
Can you please help me with a simple and short answers please. Also no meed for explanation i just need answers.Thank you Laboratory Manual to Accompany Biology, 12th Edition 19.5 Leaves A leaf is the organ that produces food for the plant by carrying on photosynthesis. Leaves are generally broad and quite thin. An expansive surface facilitates the capture of solar energy and gas exchange. Water and nutrients are transported to the cells of a leaf by leaf veins, extensions of the vascular bundles from the stem. Anatomy of Leaves Observation: Anatomy of Leaves 1. Examine a model of a leaf. With the help of Figure 19.14, identify the waxy cuticle, the outermost layer 2. Locate the upper epidermis and lower epidermis, single layers of cells at the upper and lower surfaces. that protects the leaf and prevents water loss. Trichomes are hairs that grow from the upper epidermis and help protect the leaf from insects and water loss. Find the leaf veins in your model. The bundle sheath is the outer boundary of a vein; its cells surround and protect the vascular tissue. If this is a model of a monocot, all the leaf veins will be 3. If this is a model of a eudicot, some leaf veins will be circular and some will be oval. Why? 4. Identify the palisade mesophyll, located near the upper epidermis. These cells contain chloroplasts and carry on most of the plant's photosynthesis. Locate the spongy mesophyll, located near the lower epidermis. These cells have air spaces that facilitate the exchange of gases across the plasma membrane. Label the layers of mesophyll in Figure 19.14. Collectively, the mesophyll represents which of the three types of tissue found in all parts of a plant (see Table 19.1)? 5. Label the two layers of epidermis in Figure 19.14. Find a stoma (pl., stomata). an opening through which gas exchange occurs and water escapes. Label the arrows going into and out of the stoma. Stomata are more numerous in the lower epidermis. A stoma has two guard cells that regulate its opening and closing. Figure 19.14 Leaf anatomy trichomes cuticle Water and minerals enter leaf through xylem. Sugar exits leat through phloem. air space bundle sheath cell cuticle guard cells stoma- leaf vein "Sce Laboratory 20 for more on stomata
Explanation / Answer
1. The waxy cuticle has been labelled in the figure 19.14.
2. Lower epidermis is "d" in tthe diagram and upper epidermis is "a" in the diagram.
3. In monocot, veins are parallel and in dicot the veins are reticulate. In monocots, palisade and spongy parenchyma are not differentiated, so all vascular bundles look alike.
4. Palisade parenchyma is "b " and sspongy pareparenchypareparenchyma is "c" iin the figure.
Type of tissue in mesophyll is parenchyma.
5. Two layers of epidermis are a and d. Stomata are morw in number on lower epidermis, which is already labelled in the figure.