|Life Science||Plants 5F4.00||Habits of Mind||Historical and Cultural Perspective 3.1 c|
CONTENT STANDARD: Life Science
CONTENT TOPIC: Plants
CONCEPT: All plants go through life cycles.
CONTENT OBJECTIVE: 5F4.00 To understand the life cycle of non-seed bearing plants
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Habits of Mind
BENCHMARK: Curiosity and interaction with the environment compel people to question and explain events that influence their lives.
(Corm - an underground stem that can produce new plants.) Examples of the corm are the gladiolus and the anemone. As the new plant grows, a new corm replaces the old corm. During the next growing season the new corm will produce a new plant.
(Rhizome - another kind of underground stem that can produce new plants.) An example of the rhizome is the iris.
(Tuber - a third kind of underground stem that can produce new plants.) Examples of the tubers are potatoes, begonias, and dahlias.
(Ferns - plants that have roots, stems and leaves, but do not have flowers.) Ferns use spores to reproduce. These spores can be found on the underside of the leaves at certain times of the year. Ferns have transport vessels and have the capacity to grow as tall as trees.
We will explore various methods of vegetative reproduction, a process in which reproduction originates from the vegetative parts of the plants (Roots, stems, leaves) rather than from its reproductive parts (Flowers, fruits, seeds). Plants reproduce both sexually and asexually. Propagation by the asexual method assures having new plants exactly like the parent and in a shorter period of time than the sexual reproduction. One type of asexual reproduction, vegetative reproduction, is possible because certain parts of some plants are capable of regeneration, or reproducing their missing parts. Bulbs, corms, rhizomes and tubers are all vegetative reproduction structures.
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