BIOA01H3 Lecture Notes - Lecture 4: Softwood, Ground Tissue, Phloem

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Steve Joordens

Document Summary

Slide one epidermis (root / shoots / leaves) Some cells instead of being platelet cells, become single cell thick root hairs. The zone where the root takes up nutrients are limited to root hairs. Glands are the heads filled with liquid on a stalk. Glands are the organ that produces thc (in hemp cannabis sativa) Slide five stinging hairs act as protection against herbivores: stinging nettle made of silica nettles and injects chemicals inside skin of animal attacking it. Silverberry grows in the open and suffers water shortage: it grows its epidermis into large platelets that protect the epidermis underneath from water loss. Slide eight h2o repellent epidermis lotus needs a water repellent surface to ensure effect gas exchange growing tiny cone shaped structures that cause water to aggregate and fall off the lotus. Slide nine epidermal sensing hairs venus fly trap. Slide ten epidermis of the pitcher plant pitcher plant lacks in nitrogen.