Exploring Creation with Botany Lesson One-B Review

How Do Scientist Classify Plants? To choose which phylum a plant goes in, botanist look for certain things. 1) Does the plant have tubes inside? 2) How are the seeds produced?

What is a Vascular Plant? Vascular plants have tubes like veins that carry liquid inside the plant. Liquid flowing up the plant is a mixture of water and chemicals called xylem. Liquid flowing down through the plant is a mixture of sugar and other chemicals called phloem.

Take a look at your leaf… The larger, thicker vein in the middle is called the midrib. It carries water from the stem to the rest of the smaller veins in the leaf.

What is a Nonvascular Plant? A nonvascular plant, like the moss on the tree in the picture, does not have veins. A plant without veins does not have stems, roots or leaves. Since it does not have veins, it get water by absorbing it.

What about the seeds? Botanists also look at the way plants make seeds when classifying them. For instance, they would notice that a peanut produces its seeds in a pod. The pod is the outer shell around the seeds.

There are two different kinds of plants that make seeds. AngiospermsGymnosperms Makes flowers Seed in a container One giant phyla called Anthophyta Seeds are uncovered Four different phyla Phylum Coniferophyta makes cones

Compare Four Different Phyla PhylumName Meaning Vascular or Nonvascular Type of Seeds Anthophyta Coniferohyta Pterophyta Bryophyta antho (flower) phyta (plant) conifer (cone-bearer) phyta (plant) ptero (wing) phyta (plant) bryo (moss) phyta(plant) Vascular Nonvascular Seeds in a container from a flower Seeds uncovered from a cone No seeds but sporangia (spores in a container) No seeds but sporangia (spores in a container)