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Plant cell - Wikipedia, the free encyclopedia
1 Cell types; 2 Tissue types; 3 Organelles; 4 References; 5 External links ...Parts of the strings in celery are collenchyma. ...
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Question:What are the general physical characteristics, location in a plant and the special functions of these cells?
Best answer goes to the most detailed answer, that describes each cell.
Answers:Parenchyma Cells. These cells are the most general of plant cells. They consist of thin flexible cell walls. They contain a large central vacuole and can carry out most of the metabolic functions of the plant. Mesophyll cells of the leaf are parenchyma cells. The fleshy tissue of most fruits also contain much parenchyma.
Collenchyma Cells. These cells have a much thicker primary wall than the parenchyma cell. Grouped in strands or cylinders they support young plants.
Sclerenchyma Cells. Function in support of the plant. They contain a thick secondary wall containing lignin. For all intent and purpose these cells function best when dead.
Guard cells. The stomata allow gases and water vapor into and out of the leaf. Each stoma is controlled by two bean shaped guard cells. They contain chloroplasts and are found on the under side of the leaf.
Answers:I thought they were chloroplasts.
The chloroplasts are inside the parenchma so I guess that is he answer to your question.
Question:The strongest plant cells are
A. parenchyma cells.
B. collenchyma cells.
C. sclerenchyma cells.
D. dermal cells.
2. What is the function of collenchyma cells?
A. To store starch, oils, and water for the plant
B. To provide support while allowing the plant to grow
C. To transport materials through long strands
D. To connect different types of cells
3. The function of the vascular tissue is to
A. secrete a substance that becomes the cuticle.
B. cover the outside of a plant and protect it.
C. provide support and supply materials.
D. transport water and nutrients to all parts of the plant.
4. Cohesion is a result of hydrogen bonds that form between
A. water molecules.
B. water and the xylem wall.
C. tracheid cells.
D. vessel elements.
5. Figure 21.1 shows a root tip. What are the protective cells at the very tip of the root called?
B. root cap.
C. vascular cylinder.
D. root hairs.
6. Transpiration lowers the pressure in the leaf xylem, creating a vacuum that
A. forces water out of leaves.
B. pulls water upward.
C. attracts water to the xylem wall.
D. moves water into the phloem.
7. In the pressure-flow model, sugar is pumped into the phloem, and water flows into the phloem through
A. the stomata.
B. the sap.
C. active transport.
8. Roots absorb water partly through tiny extensions of dermal cells called
A. lateral meristems.
B. apical meristems.
C. vascular cylinders.
D. root hairs.
9. Which type of tissue makes up most of the inside of a plant?
10. Figure 21.2 shows a cross section through a tree. Which tissue makes up the dark rings?
C. Vascular cylinder
11. The blade of a leaf is connected to the stem by a thin stalk called a
12. The functions of plant stems include providing support, transporting water and materials, and
A. taking up water from soil.
B. forming a vascular cylinder.
C. storing food and water.
D. exchanging gases.
13. Which leaf adaptations occur to minimize water loss in both deserts and cold dry climates?
A. Plump leaves that store water
B. Large and broad leaves
C. Needles and spines
D. Compound and double compound leaves
14. The upper surfaces of leaves are used mainly for
A. light gathering.
B. gas exchange.
C. collecting water.
D. protection from predators.
15. For what group of plants is water loss not a problem?
A. Desert plants
B. Aquatic plants
C. Cold-climate plants
D. Dry-climate plants
16. Which type of cell is found in the hard or gritty parts of fruits and vegetables?
17. Dead parenchyma cells that make up bark form a type of
A. collenchymal tissue.
B. vascular tissue.
C. dermal tissue.
D. ground tissue.
18. Water moves up from a plant s roots through cells in the xylem that
A. act like tiny pumps.
B. carry sugar to the roots.
C. have matured and died.
D. have no cell walls.
19. Phloem tissue is made up mainly of
A. xylem cells and stomata.
B. dead cells and sugar sinks.
C. vessel elements and tracheids.
D. sieve tube elements and companion cells.
20. Root hairs anchor plants and help them absorb water and minerals by
A. protecting the growing part of the root.
B. producing more xylem and phloem.
C. increasing the root s surface area.
D. lengthening the tips of roots.
21. What are the two basic forms of roots?
A. Fibrous roots and taproots
B. Long taproots and short taproots
C. Fine-branched roots and thick-branched roots
D. Vascular cylinders and meristems
22. What can you infer from a thick annual ring inside a thin annual ring in a tree trunk?
A. Low precipitation followed by high precipitation
B. A short spring followed by a very cold winter
C. Secondary growth followed by primary growth
D. Good conditions followed by harsher conditions
23. Most leaves have a broad, flat part called a
24. Which of the following helps reduce water loss?
25. Insects captured by predatory plants provide the plant with
B. carbon dioxide.
Answers:You want us to do your entire test for you? Also, question ten refers to a picture which you didn't include. These are mostly very easy questions to answer. Look up the word it's asking you about, like "collenchyma", in the index and read up about it. Come back and ask about questions you couldn't find an answer to.
Phloem tissue consists of less specialised and nucleate parenchyma cells, sieve-tube cells, and companion cells (in addition albuminous cells, fibers and sclereids).
7.02B HONORS Special Cells of a Plant :My assignment was to investigate and record observations about four of these types of specialized cells: parenchyma cells collenchyma cells sclerenchyma cells guard cells
Vascular Plant Tissues :Vascular plant tissue tutorial. In this episode Parenchyma, Collenchyma, and Sclerenchyma cell types are reviewed.