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BOT 313
Plant structures
39
Biology
Undergraduate 3
02/24/2014

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Term
Sporophytes are:
Definition
The diploid, 2n, generation of a plant. The spore producing plant
Term
Gametophyte's are:
Definition
The haploid,1n, generation. Gamete producing plant.
Term
Sorus is a:
Definition
cluster of sporangia found on the lower surface of the fern leaf
Term
The lower surface of a fern is the _____ surface
Definition
Abaxial
Term
Annulus is a:
Definition
ring or patch of cells that have thickened
Term
Meiosis that occurs in sprangium gives rise to:
Definition
4 distint haploids
Term
Archegonia is a:
Definition
sex organ that produces the egg
Term
Antheridia is a:
Definition
Sex organ that produces sperm
Term
Sperm are a prodution of:
Definition
mitosis
Term
Homosporous plants have:
Definition

One size spore

Plants are free sporing

Each spore germinates

Water is needed for live cycles

 

Term
Heterosporous plants have:
Definition

2 sizes of spore

free sporing plants

gametophytes are endosporic

Need water for fertilization 

gametophyte growth in spore wall

 

Term
_______ and ______ are the spore types for Heterosporous plants:
Definition
Megaspores & Microspores
Term
In heterosporous plants water is needed for:
Definition

Fertilization

release of sperm

Term
In Homosporous plants water is needed for:
Definition
Sperm to swim to egg, spore germination and gametophyte growth
Term
Advantages of Heterospory:
Definition

Water not needed for gametophyte growth, or  spore germination

Insures genetic recombination

Term
Gymnosperm means:
Definition
Naked seed
Term
A seed is a fertilized:
Definition
Ovule
Term
Difference between Sprores and Pollen:
Definition

Plant the come from

 # of cells

Germination location

Term

Pollen has only one cell

True or False

Definition
False
Term
Meiosis produces what in a microsporangium?
Definition
Spores or Pollen
Term
What are the seed evolution steps:
Definition
Homospory, heterospory, megasporangium surrouned by sterile telomes, free telome tips
Term
Angiosperm means:
Definition
Container seeds
Term
Seeds of angiosperms are contained in:
Definition
a carple
Term
What are some of the reproductive characters of angiosperms:
Definition

Carple encloses seeds

Double integument for seed

Has flowers

7-celled, 8 nucleate megagametophyte

3 celld microgametophyte 

double fertilization

endosperm

Term
Tepals are:
Definition
collective term for sepals & petals that look alike
Term
What is a Locule:
Definition
the chamber containing seeds
Term
What is monosporic embryo sac development?
Definition
after meiosis, 4 haploid megaspores are created and 3 abort and 1 divides and forms the megagametophyte.
Term
A mature embryo sac contains:
Definition

Egg

2 snergids

3 antipodal cells 

2 polar nuclei in central cell

Term
Endosperm is found in:
Definition
Angiosperms only
Term
The main groups of steles:
Definition

Protosteles

Siphonosteles

Eusteles

Term
Types of Protosteles:
Definition
Haplosteles, actinostele, plectostele, medulated protostele
Term
Types of Siphonosteles:
Definition

Solenostele

dictyostele

ectophloic

amphiphloic

 

Term
Types of Eusteles:
Definition

Eustele

atactostele

Term
What is a stele:
Definition
A tissure in the endodermis, recognized by the configuration of vascular tissue
Term
Protostele has what characteristics:
Definition
Core of xylem, no leaf gaps
Term
Siphonostele has what characteristics:
Definition
Hollow cylinder of xylem, has pith, has leaf gaps
Term
Eustele has what characteristics:
Definition
Xylem and phloem arranged as a ring of bundles. bundles form symopodia. Has a pith. No true leaf gaps
Term
Solenostele has how many leaf gaps in a single cross section:
Definition
One
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