IB Bio Plant Biology

This is my IB Bio plant unit flashcards. It is tagged as HL but I'm taking the SL course and this is one of our topics so I'm not really sure why that is not an option for my course level.

Pollination

transfer of pollen from anther to stigma

Fertilization

fusion of sperm/pollen with the egg in the ovary leads to zygote

seed dispersal

seed is formed and then moves away from the parent to reduce competition between the two

Self Pollination

fusion of male and female gamete from the same plant

Cross Pollination

from two different plants, pollen can spread from wind but is usually brought by a pollinator like a bee

Stamen

male plant reproductive system

Anther

pollen producing organ

Filament

stalk supports anther and makes it available to pollinators

Pistil

female reproductive portion

Stigma

sticky tip to catch pollen

Style

tube shaped structure that connects stigma to ovule

Ovule

structure containing female reproductive cell

Petal

modified leaves to attract pollinators

Sepal

outer cover protecting flower

Peduncle

stalk of flower

thylakoid surface area

allows for greater absorption of light

small space in thylakoid

allows for faster accumulation of proteins to create a concentration gradient

Thylakoids

flat membrane bound sacs that help with light absobtion

Stroma

Fluid similar to cytosol, Contains chemicals and enzymes needed for photosynthesis

Double Membrane

keeps the enzyme and working structures away from the rest of the cell

Chlorophyll a

~430 nm and ~670 nm

Chlorophyll b

~452 nm and ~640 nm

Limitations of Photosynthesis

temperature, concentration of CO2, availability of light

ATP and NADH

used in calvin cycle

O2

waste product