Study Guides (248,010)
Canada (121,224)
Biology (194)
BIOL 1902 (62)

Nov 28.docx

2 Pages
Unlock Document

BIOL 1902
Michael Runtz

 Some nectar guides are invisible to us  How do plants avoid SELF-POLLINATION? o SELF-STERILITY or SELF-INCOMPATABILITY  SPATIAL PLACEMENT of sex organs  Pink Lady’s-slippers also employ a placement strategy o STAMINODE o Both exits are partially blocked by the STAMINODE and sticky POLLEN MASSES  SPATIAL SEPARATION of sexes o (A) Separate sexes on the same plant (Monoecious)  Female flowers of conifers are usually near the top of the tree and the males at the bottom  Why are they high up?  So pollen from the male flowers does not fall on them o (B) SPATIAL SEPARATION of sexes on different plants (Dioecious)  White Campions plants are either male or female o PERFECT FLOWERS o TEMPORAL SEPARATION of sexes  Orange jewelweed flowers start off as males  The male part falls off and the flower becomes female (prevents self-pollination) o Temporal sex change = DICHOGAMY o Potrandry = male first  Pickerel-weed has another way of avoiding self-pollination  Flowers appear in different forms (stamens/style) heterostyly
More Less

Related notes for BIOL 1902

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.