Plants

Plant Cells

• Cell walls provide protection and structure• Conduct photosynthesis– Use chlorophyll in organelle chloroplast to do it

Structures

• Cuticle waxy, protective layer secreted onto surface of plant which holds water

• Cellulose chemical compound that provides structure and support

Classificiation

• Vascular plants use tubelike structures that carry water and nutrients throughout plant

• Nonvascular plants lack tubelike structures so must use other ways to transport water and nutrients

Nonvascular Plants

• Very small plants that have rhizoids rather than roots

• Reproduce by spores not seeds• Examples– Mosses green, leaflike growths around stalk– Liverworts flattened, leaflike bodies– Hornworts one chloroplast in each cell

Moss

Liverwort

Hornwort

Plant Life Cycle

• Two stages– Gametophyte stage begins when sex cells

produce haploid cells called spores– Sporophyte stage begins with fertilization