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Lecture Comments (5)

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Post by jitendra singh on October 4, 2015

do they keep up by what the middle schools teachers do

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Post by Deborah Crowe on March 10, 2015

at 15:33 360 MILLION YERAS AGO?! that not even realistic

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Post by Stella Siebelink on November 7, 2014

All these facts on Life Science are so cool! I never knew about a lot of things until now like vascular and non-vascular plants! Thank you Mrs. McIntyre! I love this class!

1 answer

Last reply by: Stella Siebelink
Fri Nov 7, 2014 2:19 PM

Post by geraldine lavallee on September 1, 2012

peat moss is bad for soil if you work it into the soil. It is good for the surface of the soil, as it repels water and holds water in. Peat moss is also replete of nutrients. (good it you put it above the soil around new plantings---bad if you work it into the soil for new plantings)

Bogs, where the peat moss is mined from (top layer of living sphagnum) can also take thousands of years to rebuilt.

Seedless Plants

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.

  • Intro 0:00
  • Objectives 0:09
    • Objectives
  • Plant Classification 0:36
    • Vascular and Nonvascular
    • Vascular-Seed or Seedless
    • All Nonvascular- Seedless Only
  • What is a Bryophyte? 2:51
    • Seedless, Nonvascular Plants
    • Use Spores Instead of Seeds
    • 3 Groups: Mosses, Liverworts, Hornworts
  • Where do Bryophytes Grow? 4:56
    • Water and Diffusion
  • Why are Bryophytes Important? 6:36
    • Maintain Healthy Ecology
    • Soil Builders
    • Store Water
  • Mosses 8:38
    • Mosses
  • Liverworts 10:04
    • Liverworts
  • Hornworts 11:19
    • Hornworts
  • What are Pteridophytes? 11:57
    • What are Pteridophytes?
  • Ferns 13:38
    • Characteristics of Ferns
  • Club Mosses 16:04
    • Club Mosses
  • Horsetails 17:39
    • Horsetails
  • Example 1: Name One Similarity and One Difference Between Bryophytes and Pteridophytes 20:24
  • Example 2: What Does the Fossil Record Tell Us About Seedless Plants Living Millions of Years Ago? 22:49
  • Example 3: How Do Nonvascular Plants Get Water and Nutrients? 23:52
  • Example 4: Identify the Plant in the Pictures Below 24:14