Download Unit 6 - root,stems, leaves

Plant Unit
Dates: April 3 - April 27
Chapters: 17 - 19
Assignments:
Plant Tissues - Lab 14
Worksheet - Roots
Worksheet - Stems
Worksheet - Leaves
Investigation 15 - Flowering plants
Investigation 16 - Fruit, Seeds, and Seedlings
Investigation 17 - Regulation of Growth in Plants
Evaluation:
April
April
April
April
April
April
10
13
18
20
24
27
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Root Quiz
Stem Quiz
Leaf Quiz
Flower Quiz
Seed Quiz
Plant Test
At the conclusion of this section of the plant unit, the student should be able to:
1. describe the different plant tissues and how they function.
2. explain the function of roots and stems.
3. point out the difference between a fibrous and a taproot.
4. explain the importance of root hairs in the absorption of water and nutrients from the
soil.
5. show how roots and vascular tissues contribute to a redwood tree's great size.
6. explain the difference between summerwood and springwood;
sapwood.
heartwood and
7. use their knowledge of vascular tissue, explain why making a cut through the bark
of a tree in a complete circle around the trunk often results in the death of the tree.
8. compare simple leaves and compound leaves and explain how these shapes related to
solar energy collecting.
9. explain how a certain leaf modification may help adapt the organism to different
environmental conditions. (i.e. the modified thorns of a cactus)..
10. discuss how the internal structures of the leaf enables it to carry out its function
11. explain the adaptive advantages for loss of leaves by trees and shrubs in the winter.
12. give the location and function of the following flower parts: sepals, petals, stigma,
anther, and ovary.
13. describe the pollination process from stamen to pistil.
14. explain how the color and shape of the plant’s flowers explain its method of
pollination.
15. explain the formation of a pollen tube and how fertilization takes place. What is
double fertilization?
16. describe two ways plants reproduce vegetatively in nature.
1. describe the parts of a typical seed.
17. explain the advantage for seeds to have a starchy endosperm as opposed to a sugary
endosperm.
18. describe seed germination up to the period in which the leaves are formed.
19. explain how seed plants are better able to survive drier conditions than mosses and
ferns.
20. explain what a plant tropism is and give an example of both a positive and a
negative tropism for a stem. For a root.
21. explain the role of auxin in making a plant grow toward a light source.
Vocabulary:
dormancy
angiosperm
annual
herbaceous
zone of elongation
stoma
palisade layer
girdling
hypocotyl
hototropism
hydrotropism
tube nucleus
embryo
dicot
biennial
lateral bud
zone of maturation
guard cells
spongy mesophyll
pollination
epicotyl
gravitropism
polar nuclei
generative nucleus
gymnosperm
monocot
perennial
seed coat
petiole
mesophyll
transpiration
cotyledon
radicle
thigmotropism
egg nucleus
sperm nucleus
Extra Credit:
1. If you were weeding a lawn, would you be more successful at removing weeds with a
taproot or weeds with fibrous roots? Explain your answer.
2. When transplanting a plant, it is important not to remove any more soil than
necessary from around the roots. From your knowledge of the function of roots and
root hairs, why is this so important?
3. A farmer decides not to plant his fields one year. Later in the year heavier than
normal rains fall on the field. Now the farmer wishes he had planted his crops. Why do
you think he changed his mind?
4. A student notices that leaves at the very top of a shrub are relatively small and thick.
Leaves lower down on the shrub are broader and thinner. Develop a hypothesis to
account for the two types of leaves.
5. Suppose you were going on vacation and you couldn't find anyone to water your
houseplants. You knew that plants lose water through the stomata in their leaves, so
you decide to cover the leaves with petroleum jelly to prevent water loss. When you
returned home, would you expect to find your plants dead or alive? What is the most
logical explanation for what may happen?