Cotyledons

cotyledons
The one (monocot) or two (dicot) seed leaves of an angiosperm embryo.
Covered in Lab 8 Seed Plant Reproduction
cranium
The skull of vertebrates.
Covered in Lab 13 Animal Diversity III ...
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Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. As these leaves are held horizontally, upper epidermis is directly illuminated. Less number of stomata on the upper epidermis can then prevent water loss.
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The cotyledons may be ephemeral, lasting only days after emergence, or persistent, enduring a year or more on the plant. The cotyledons contain (or in the case of gymnosperms and monocotyledons, have access to) the stored food reserves of the seed.
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the cotyledons spread apart
the primary leaves
grow to full size
turn green ...
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Number of cotyledons -- The number of cotyledons found in the embryo is the actual basis for distinguishing the two classes of angiosperms, and is the source of the names Monocotyledonae ("one cotyledon") and Dicotyledonae ("two cotyledons").
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a plant having two seed leaves or cotyledons; contrast with monocotyledon
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
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dicots One of the two main types of flowering plants; characterized by having two cotyledons, floral organs arranged in cycles of four or five, and leaves with reticulate veins; include trees (except conifers) and most ornamental and crop plants.
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true leaf. Any leaf produced after the cotyledons.
tuber. An enlarged, fleshy, underground stem with buds capable of producing new plants.
tuberization. The formation of tubers at the ends of stolons; tuber initiation.
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A member of the class of flowering plants having two seed leaves, or cotyledons, among other distinguishing features; often abbreviated as dicot.
differentiation
See cellular differentiation.
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coleorhiza Sheath surrounding the radicle (embryonic root) of monocotyledons.
coliform bacteria Bacteria that live in the intestines (including the colon) of humans and other animals; used as a measure of the presence of feces in water or soil.
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The structure involved in connecting the fetal and maternal tissues consisting of a cotyledon and a caruncle in the cotyledonary placenta. The cotyledons or chorionic villi are of fetal origin and "plug into" the caruncles or receptacles in the ...
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