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Angiosperms and Gymnosperms

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Intro

Angiosperms

There are over 250,000 species of angiosperms. Angiosperms are flowering plants. They make up around 80 percent of all the living plant species on Earth.

  • Dicots

  • monocots

Angiosperm resources

PBS Natureworks: Angiosperms

Gymnosperms

{excerpted from http://education-portal.com/academy/lesson/gymnosperms-characteristics-definition-types.html }

Gymnosperms were the first plants to have seeds.
They have naked seeds – as they do not have flowers
The seeds develop on the surface of the reproductive structures of the plants, rather than being contained in a specialized ovary.
These seeds are often found on the surface of cones and short stalks.

Characteristics of Gymnosperms
They do not have an outer covering (shell) around their seeds.
They do not produce flowers.
They do not produce fruits.
They are pollinated by the wind.

Examples include conifers

conifers

Gymnosperm resources

Education Portal: Gymnosperms

Study.com gymnosperms-characteristics-definition-types

Monocot versus dicot

Two types of seeds, monocots and dictos.

monocot v dicot seeds

Let’s watch the two types sprout:

Grass (monocot) sprouting on left. The cotyledon remains underground and is not visible). Compare to a dicot sprouting on the right.

Monocot_vs_dicot_sprouting

{ http://en.wikipedia.org/wiki/Monocotyledon }

What kinds of plants come from these different types of seeds?

Monocot plants versus dicot plants

monocot v dicot

Comparison chart

Gymnosperms vs angiosperms

 

Learning Standards

Massachusetts Science and Technology/Engineering Curriculum Framework

Life Science (Biology), Grades 6–8.
Classify organisms into the currently recognized kingdoms according to characteristics that they share. Be familiar with organisms from each kingdom.

Biology, High School
5.2 Describe species as reproductively distinct groups of organisms. Recognize that species are further classified into a hierarchical taxonomic system (kingdom, phylum, class, order, family, genus, species) based on morphological, behavioral, and molecular similarities.

Benchmarks for Science Literacy, American Association for the Advancement of Science

Students should begin to extend their attention from external anatomy to internal structures and functions. Patterns of development may be brought in to further illustrate similarities and differences among organisms. Also, they should move from their invented classification systems to those used in modern biology… A classification system is a framework created by scientists for describing the vast diversity of organisms, indicating the degree of relatedness between organisms, and framing research questions.

SAT Biology Subject Area Test

Evolution and diversity: Origin of life, evidence of evolution, patterns of evolution, natural selection, speciation, classification and diversity of organisms.

Teaching About Evolution and the Nature of Science, National Academy Press (1998)

Biological classifications are based on how organisms are related. Organisms are classified into a hierarchy of groups and subgroups based on similarities which reflect their evolutionary relationships. Species is the most fundamental unit of classification.

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