BIOL 104 Lecture Notes - Lecture 5: Eudicots, Cotyledon, Monocotyledon
9 Mar 2020
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Laboratory exercise 5: vegetative morphology: morphology = study of plant form, 3 vegetative organs: Long and slender: parallel veins, blade and sheath tend to blend together; appearing like 1 structure. Eudicots: simple, lobed, or sub-divided into leaflets, when the leaf blade is comprised of many leaflets compound lead, distinct leaf blades at the end of a stalk petiole. Leaf base attaches to the petiole of the stem. Exercise #1: general leaf morphology: 3 parts of a leaf: blade, petiole and leaf base, monocot, parallel venation. Eudicot: netted venation, palmate leaf shape, 2 cotyledons. If an axillary bud is at the base of it"s petiole: compound leaf: If you don"t find an axillary bud at the base of it"s petiole, it is likely a compound leaf. Exercise #3: leaf modifications: 4 types of leaf modifications, storage. Water: leaves modified for water tend to have a thick mesophyll and a thick cuticle to minimize water loss from the leaf surface.
