Flashcards in Lectures 27/28 - Plants Deck (67)
_____ and plants share a common ancestor
What are 5 characteristics that separate plants from charophytes?
1. alternation of generations
2. multicellular, dependent embryos
3. Walled spores in sporangia
4. multicellular gametangia
5. apical meristems (grows up)
Why are plants called embrophytes?
-dependent embryos housed within parent gamenophyte
What makes spores so special?
they have sporinpollenin
What are the 2 types of vascular tissue?
What is xylem made of?
What is sporinpollenin?
prevents exposed zygotes from drying out
What are lignin?
-strengthen water conducting cells like xylem
-provide structural support
What do xylem transport?
water + minerals
What do Phloem transport?
sugars, amino acids, organic material
What are the 2 types of leaves?
What are microphylls?
leaves with a single vein
What are megaphylls?
leaves with a highly branched vascular system
Are gametophytes haploid or diploid?
What are 2 other features in vascular plants not found in other plants
Gametophytes produce _____ gametes by _____
are sporophytes diploid or haploid?
Sporophytes produce ____ _____ by ______
haploid, spores, meiosis
What are heterosporous plants?
-produce megaspores that become female gametophytes
-microspores that become male gametophytes
What are homosporous plants?
produce bisexual gametopytes
What are the 3 phyla of seedless nonvascular plants?
1. hepatophyta (Liverworts)
2. anthocerophyta (Hornworts)
3. brophyta (mosses)
What is the ecological importance of Peat moss?
can be used as source of fuel
How are seedless vascular plants grouped?
part of a grade
What is a grade?
based off similar characteristics rather than common ancestor
What are the 2 phyla of seedless vascular plants?
1. Lycophytes (club mosses)
2. Monilophytes (ferns)
What is the ecological importance of seedless vascular plants?
-caused global cooling during carboniferous
-formed coal deposits
What is an integument?
-protective layer for the seed
How many integuments in gymnosperms? angiosperms?
What is a megaspore?
-larger (female?) spore