Shared Flashcard Set

Details

Chapters 24,25
Reproduction in Seed Plants & Plants Responses and Adaptations
47
Biology
9th Grade
03/05/2013

Additional Biology Flashcards

 


 

Cards

Term
ovule
Definition
  • where female gametophytes develop
  • hardens to become a seed
Term
endosperm
Definition
  • food rich tissue that nourishes a seedling as it grows
  • triploid
  • sperm+2 nuclei = endosperm

 

Term
cytokinin
Definition
plant hormone that promotes cell elongation
Term
thigmotropism
Definition
response of plants to touch
Term
style
Definition
narrow stalk of the carpel in a flower
Term
petal
Definition
  • structure inside the sepals
  • attracts insects and other pollinators
Term
phototropism
Definition
tendency of plants to grow toward a source of light
Term
sepal
Definition
outermost circle of flower parts that encloses the bud before it opens and protects the flower when its developing
Term
stamen
Definition
  • male part of the flower
  • made up of an anther and a filament
Term
stigma
Definition
sticky portion at the top of the style where pollen grains frequently land
Term
carpel
Definition
innermost part of a flower that produces the female gametophyte
Term
anther
Definition
flower structure in which haploid male gametophytes are produced
Term
ovary
Definition
structure that contains one or more ovules from which female gametophytes are produced
Term
hormone
Definition
substance produced in one part of an organism that affects another part of the same organism
Term
auxin
Definition

substance produced ub the tip of a seedling that stimulates cell elongation

 

Term
ethylene
Definition
plant hormone that stimulates fruits to ripen
Term

dormancy

 

Definition
period of time during which a plant embryo is alive but not growing (fall and winter)
Term
filament
Definition
long, thin structure that supports an anther
Term
germination
Definition
early growth stage of a plant embryo
Term
gravitropism
Definition
response of a plant to the force of gravity
Term
giberellin
Definition
growth-promoting substance produced by plants
Term
what are the male and female gametophytes?
Definition
male is pollen, female is the ovules
Term
name the four whorls
Definition
  • calyx
  • corolla
  • androecium
  • gynoecium
Term
calyx
Definition
  • outermost whorl
  • made up of sepals
Term
corolla
Definition
  • second whorl
  • made up of the petals
Term
androecium
Definition
  • male whorl
  • made up of stamens
Term
gynoecium
Definition
  • female whorl
  • innermost whorl
  • made up of one or more pistils
Term
why is double fertilization an adaptation?
Definition
adaptive because the new plant needs food (endosperm)
Term
microsporogenesis
Definition
  • pollen cell(2n) undergoes one meiotic division
  • produces four haploid microspores
Term
megasporogenesis
Definition
  • mother cell (2n) undergoes one mitotic division
  • produces one haploid cell
  • other three cells disinegrate
Term

what is a complete flower?

 

Definition
complete flowers have all four typical parts: stamens, pistils, sepals, petals
Term
what are perfect flowers?
Definition
flower with male and female parts
Term
what are imperfect flowers?
Definition
flowers with only one type of reproductive part
Term
what are the two types of imperfect flowers?
Definition
  • staminate: (male) only have stamens
  • pistillate: (female) only hav pistils
Term
what are monoecious plants?
Definition
they have imperfect flowers on ONE plant
Term
what is the pericarp
Definition
outer wall of the ovary
Term
first step in plant repoduction
Definition
formation of egg and pollen (sperm)
Term
what is the 2nd step in plant reproduction
Definition
pollination
Term
what is the 3rd step in plant reproduction?
Definition
pollen tube formation
Term
what is the 4th step in plant reproduction?
Definition
fertilization (ovary)
Term
what is the 5th step of plant reproduction
Definition
fruit formation at the base of the flower
Term
what is the 6th step of plant reproduction?
Definition
seed developement in the fruit
Term
what is the 7th step of plant reproduction?
Definition
seed dispersal (spreading)
Term
what is the 8th step of plant reproduction?
Definition
seed germination
Term
what is the 9th step of plant reproduction?
Definition
growth of plant
Term
what is the 10th step of plant reproduction?
Definition
formation of flower
Supporting users have an ad free experience!