Chapter 24

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by beansonch
Last updated 6 years ago

Discipline:
Science
Subject:
Biology
Grade:
12

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Chapter 24

-Leaves: carries out the majority of photosynthesis in plants, made of mesophyll cells.-Monocots and Dicots (see video) -Apical meristems: located at or near the tips of stems and roots where they increase the length of such structures.-epidermis: cover the entire body of nonwoody plants and young woody plants. -cuticle: part of epidermis that is exposed to the outside air in order to minimize water loss. -trichomes: hairs produced by epidermis that both protect the plant from too much sun and conserve moisture.-ground tissue: fills the interior of a plant -parenchyma: cells that are the most abundant in a plant. Least specialized type of cell within a plant.-vascular tissue: transports water and nutrients within the plant as well as providing support. -xylem: transports water and minerals from roots to the leaves. -phloem: transports sucrose and other organic compounds, usually from the leaves to roots.-tracheids: have pits that allow for water to move across the end and side walls. -sieve-tube members: conducting cells of phloem. Contain cytoplasm but no nuclei. -vascular cylinder: where the vascular tissue is located in roots. -vascular bundles: where vascular tissue is located in the stem, -leaf veins: where vascular tissue is located in the leaves.-primary root (taproot): grows straight down and remains the dominant root of the plant. -fibrous root system: no single, main root, instead is a large number of slender toots that grow from the lower nodes of the stem when the first root dies. -root nodules: where nitrogen-fixing bacteria live.

Chapter 24

Summary

Definitions

The chapter largely dealt with the organization of plants, specifically in regard to their stem, leaf, and root structures. The root is considered the anchor of the plant and is also in charge of absorbing water and minerals, as well as storing the products of photosynthesis. Stems are the organs that produce new tissues, support the leaves, transport minerals form the root system to the leaves and back, and storing plant products. Leaves are specialized for gas exchange and carry out the majority of photosynthesis within the plant. Flowering plants are classified into monocots and dicots (see video). These plants also have three types of tissue; dermis, vascular, and ground tissue. The vascular tissue consists of xylem and phloem, which transport water and minerals, and sucrose and other organic compounds, respectively.

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