14_Maloof_Intro_Plants_Outline - 1 What are plants We will...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1) What are plants? We will spend the next 2 weeks exploring one of the major branches on the tree-of-life, plants. A good place to start is with a definition of plants. There are several that we could use, but I will use the same as the book. When I say “plants” I am referring to the Land Plants or embryophytes (more about that in a minute). a) Land plants are: i) Eukaryotes ii) Photosynthetic , they contain chloroplasts iii) Multicellular iv) Organisms that retain a fertilized egg and developing embryo in a protected structure on the parent plant. This is where the term embryophyte comes from. Retention of an embryo is a key synapomorphy defining the land plant grouping. v) Monophyletic b) A broader definition, green plants, includes the green algae 2) What is the importance of plants? 3) Where did plants come from ? a) Shared features (1) Chloroplasrts ii) Chlorophyll a and b iii) Embryos (1) But we already said that this was a synapomorphy iv) Cellulose in cell wall v) Starch as storage molecule for photosynthesis Chloroplast Starch as storage in plastid Chlorophyll b encasement of egg embryos Land Plants Y Y Y Y Y Charales (Green Algae) Y Y Y Y N Other Green Algae Y Y Y N N Red Algae Y N N N N
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
vi) So plants share the most traits with a group of green algae known as the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

14_Maloof_Intro_Plants_Outline - 1 What are plants We will...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online