Botany Unit 2
Bryophytes
-nonvascular -no xylem & phloem -only plant with dominant gametophyte generation -sporophytes remain permanently attached and nutritionally dependent on the gametophytes
________ is a leaf that arose from a branch system
A megaphyll
Stomata
Allow gas exchange for photosynthesis
Plants probably descended from a group of green algae called
Charophytes
The waxy layer that covers the arias parts of plants is the
Cuticle
This statement is not true
Ferns are the most economically important group of borohyotes
These plants have hollow, jointed stems that are impregnanted with silica
Horsetails
These plants have vascularized stems but lack true roots and leaves
Horsetails
The borophytes
Include: whisk ferns, horsetails, club mosses, and small plants that lack a vascular system
The green, gametangia-bearing moss plant
Is a haploid gametophyte generation
A strengthening compound found in cell walls of vascular plants is
Lignin
In plant life cycles...
The first stage in the diploid sporophyte generation is the zygote
Not a characteristic of a plant
Unicellular gametangia