Enter your Sign-on user name and password.

Forgot password?
  • Follow us on:
Loading video...

Start Learning Now

Our free lessons will get you started (Flash® 10 required).
Get immediate access to our entire library.

Sign up for Educator.com

Features Overview

  • Get on-demand access to our complete library
  • Search and jump to exactly what you need to learn
  • Track your progress
  • Download practice and lesson files
  • *Ask questions and get answers from our community & instructors

Fungi

  • Fungi are unicellular or multicellular eukaryotes with cell walls containing chitin.
  • Multicellular fungi are composed of microscopic thread-like structures called hyphae. Adjacent cells are separated from each other by septa. Coenocytic fungi lack septa and are multinucleated. Groups of hyphae form a mycelium, which is a visible structure.
  • Fungi play an important role in the environment. As decomposers, they break down organic materials, releasing the organic components for reuse.
  • Certain fungi form mycorrhizae in association with the roots of plants. This symbiotic relationship provides the plant with increased surface area for the absorption of water and minerals and provides the fungus with a source of carbohydrates.
  • Lichen are the result of a symbiotic relationship between fungi and either cyanobacteria or green algae. Lichen can survive in extreme conditions and are one of the first colonizers of a new area.
  • Plasmogamy is the fusion of the cytoplasm of two cells, without fusion of the two nuclei. Karyogamy is the fusion of the nuclei and may occur long after plasmogamy in fungi.

Fungi

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

AP Biology Intro