Study B: Roots Roots and stems often appear similar, except that roots grow in the soll and stems
above ground. Apical meristems elongate both in a process called primary growth. The root tip is
covered by a root cap, which protects the apical meristem as the root pushes through soil, then
growth occurs just behind the root tip, in three zones of cells. Zone of cell division is localized on
the tip, where cells are intensively multiplying; then zone of elongation or cell growth. Finally, zone
of differentiation, when ground and vascular tissues start to form. Examine the tip of the onion root
(longitudinal section) under low magnification in the compound microscope. Please sketch it
below. ( 6 pts) Observe, identify and mark: root cap, zone of cell division, zone of cell elongation
and differentiation.The functions of the roots include: a. anchorage of the plant to the soil, b.
absorption of water and minerals from the soil, c. conduction of water and minerals from the region
of absorption to the base of the stem, d. starch storage to varying degrease, depending on the
plant. Examine the cross section through the root under low magnification. Please note that we
have a slide with dicot and monocot root cross section. Please pick up dicot root with vascular
tissue inside. Note that the roots lack a central pith. The vascular tissue is located in the center of
the root and it is called the vascular cylinder. ( 5pts ) Observe, identify and mark: epidermis,
cortex, vascular cylinder, xylem, phloem, endodermis and pericycle. Answer following questions:
Question: Suggest advantage of taproots and fibrous roots under different environmental
conditions. (2 pts) Question: Compare the structure and organization of roots and stems. How do
these two organs differ? (2 pts)roots. (2 pts) Question : Note the epidermis of the root lacks a
cuticle. Can you explain why this might be advantageous? ( 2 pts) Question: What is the function
of the endodermis? why is the endodermis important for the success of plants in the land
environment? ( 2 pts).
Study B Roots Roots and stems often appear similar except .pdf
1. Study B: Roots Roots and stems often appear similar, except that roots grow in the soll and stems
above ground. Apical meristems elongate both in a process called primary growth. The root tip is
covered by a root cap, which protects the apical meristem as the root pushes through soil, then
growth occurs just behind the root tip, in three zones of cells. Zone of cell division is localized on
the tip, where cells are intensively multiplying; then zone of elongation or cell growth. Finally, zone
of differentiation, when ground and vascular tissues start to form. Examine the tip of the onion root
(longitudinal section) under low magnification in the compound microscope. Please sketch it
below. ( 6 pts) Observe, identify and mark: root cap, zone of cell division, zone of cell elongation
and differentiation.The functions of the roots include: a. anchorage of the plant to the soil, b.
absorption of water and minerals from the soil, c. conduction of water and minerals from the region
of absorption to the base of the stem, d. starch storage to varying degrease, depending on the
plant. Examine the cross section through the root under low magnification. Please note that we
have a slide with dicot and monocot root cross section. Please pick up dicot root with vascular
tissue inside. Note that the roots lack a central pith. The vascular tissue is located in the center of
the root and it is called the vascular cylinder. ( 5pts ) Observe, identify and mark: epidermis,
cortex, vascular cylinder, xylem, phloem, endodermis and pericycle. Answer following questions:
Question: Suggest advantage of taproots and fibrous roots under different environmental
conditions. (2 pts) Question: Compare the structure and organization of roots and stems. How do
these two organs differ? (2 pts)roots. (2 pts) Question : Note the epidermis of the root lacks a
cuticle. Can you explain why this might be advantageous? ( 2 pts) Question: What is the function
of the endodermis? why is the endodermis important for the success of plants in the land
environment? ( 2 pts)
