1114 - November 14, 2011 Plants 1. alternation of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
November 14, 2011 Plants 1. alternation of generations in plants a) begin with the zygote, which is diploid b) zygote undergoes mitosis to create a diploid sporophyte c) sporophytes make spores inside the special organs: sporangia d) sporangia undergo meiosis to become spores e) spores undergo mitosis for growth, producing a multicellular gametophyte f) gemetophytes produce gametangia (anteridia and archaegonia) g) egg and sperm unite, and zygote is formed for the next generation h) both phases of the life cycle may coexist in many species, the sporophyte continues to live after its spores disperse and develop into gametophytes 2. Land plants exhibit two tupes of alternation of generations a) homosporous: only one type of spore is produced. All spores appear identical to one another this is the ancestral condition in plants and applies o the non-vascular plants spores undergo mitosis, developing into a single type of multicellular, bisexual gametophyte with both male and female reproductive organs
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

1114 - November 14, 2011 Plants 1. alternation of...

This preview shows document pages 1 - 2. Sign up to view the full document.

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