Biology 20B- May 5

Biology 20B- May 5 - 2 Collenchyma – “glue” a...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 20B Lecture: May 5 Classification of Plants No seeds: Algae (also non vascular) Bryophytes (mosses) (also non vascular) Seedless vascular plants (ferns and hursertails) Vascular and Seeds: Gymnosperms (conifers) Angiosperms ( flowering plants) Structure and Function Plants need… -mineral ions -water -light -CO 2 Plant Cells -have vacuoles - cell wall - chloroplasts Meristemotic Cells (plant stem cells) 3 types of cells 3 types of divisions organ roots or shoots 1. Parenchyman “poured in beside” a. Totipotent- can be stem cells b. Thin cell walls c. Metabolically active d. Photosynthetic (chlorenchyma) e. Most of a leaf f. Storage cells in roots g. Most of a fruit h. Found in: i. Ground tissue?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2. Collenchyma – “glue” a. Thickened cell walls b. Occur in bundles, makes celery stringy c. Long, pliable d. Alive when mature e. Rich in pectin jelly f. Found in: i. Leaf perioles, nonwoody stems, and growing organs 3. Schlerenchyma a. Thickened 2 nd cell wall b. Dead when mature, non growing part c. Lignin d. Structure and support e. Protection of seeds and fruits f. Different types i. Sclerids- groups of cells, make pears gritty ii. Fibers- what we wear 1. Fibers in tree bark 4. Ground tissue a. Everything else b. Metabolically active c. Photosynthetis, storage (parachma) d. Support (sclerenchyma and collenchyma) e....
View Full Document

This note was uploaded on 09/15/2009 for the course BIOE 20B taught by Professor Williams during the Spring '09 term at UCSC.

Page1 / 2

Biology 20B- May 5 - 2 Collenchyma – “glue” a...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online