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18 Cards in this Set
- Front
- Back
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Cotyledons
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storage tissue that provides nutrition to the developing seedling
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In a monocot,
What are the Number of Cotyledons? What is the leaf venation? The flower parts? Vascular bundles? Roots? |
Cotyledons: 1
Leaf Venation: parallel Flower Parts: 3's or multiples of 3's Vascular Bundles: scattered Roots: Fibrous system (cluster) |
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In a dicot,
What are the Number of Cotyledons? What is the leaf venation? The flower parts? Vascular bundles? Roots? |
Cotyledons: 2
Leaf Venation: Netted (branching) Flower Parts: 4's or 5's or multiples of Vascular Bundles: organized in a circle Roots: taproot system |
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What are the three types of ground tissue?
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Parenchyma, Collenchyma, Sclerenchyma
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Parenchyma cells are....
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the most common component of ground tissue, have thin walls, do: storage, photosynthesis, secretion
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Collenychma cells ....
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have thick but flexible cell walls, serve mechanical support functions
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Sclerenchyma cells...
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have thicker walls than collenychma, also provide mechanical support
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Dermal Tissue
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consists of epidermal cells that cover the outside of plant parts, guard cells that surround stomata, and specialized cells
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Where do cuticles come from?
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In aerial portions of the plant, the epidermal cells secrete a waxy protective substance which is the cuticle.
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Two types of vascular tissue?
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Xylem and Phloem that occur together in vascular bundles.
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What does xylem do?
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Transports water and minerals and provides mechanical support with its secondary wall.
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What is a pit in xylem?
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An area where there is no secondary wall.
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Is xylem of phloem dead at maturity?
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Xylem
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What are the two types of xylem cells?
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Tracheids - long, skinny, tapered, and
Vessel Elements (or vessel members) - short, fat, use perforations, more evolutionarily advanced |
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Phloem moves what!?
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Sugars.
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What's phloem made of?
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Sieve-tube members (or elements) but no nuclei or ribosomes!
Pores on the end are called sieve tube plates (where cells touch) |
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What are companion cells?
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living parenchyma cells that lie adjacent to each sieve tube member connecting them with cytoplasm called PLASMODESMATA which maintain physiological support to the nuclei-lacking sieve-tube members
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What does a seed consist of?
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A coat, an embryo, and storage material that can be either endosperm or cotyledons.
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