Unit 4 Flashcards
In what parts of the chloroplast does photosynthesis take place
Thylakoid Membrane (Light reactions) Stroma (Calvin cycle)
PS2 VS PS1
PS2
absorbes solar energy to energize electrons
replacement electrons acquired by splitting water
releases oxygen
(Solar energy in, Oxygen out)
PS1
absorption of solar energy energizes electrons
replacement electrons come from the electron transport chain
Electrons and a hydrogen passed to NADP+ to become NADPH
Calvin Cycle
Powered by ATP and NADPH from light reactions
End product is glucose
Steps of calvin cycle
Carbon dioxide fixation
Carbon dioxide reduction
Regeneration of 1st substance
Why is there a difference in rates of photosynthesis depending on the color of light
White light emits all colors, allowing a leaf to absorb more energy
If you were to change the color to green, photosynthesis would slow due to the fact that the leaf doesn’t absorb the color green well
What is the ancestor to all living land plants
a type of freshwater green algae
5 Evolutionary events of land plants
Embryo protection Vascular Tissue Megaphylls Seeds Flowers
Sportophyte VS Gametophyte
SPOROPHYTE
Diploid
produces haploid spores by meiosis
GAMETOPHYTE
Haploid
produces gametes by mitosis
Gametes fuse to form diploid sporophyte
Fern VS Conifer
FERN
swimming sperm
megaphylls
spores
CONIFER seeds (cones) pollen pine needles dont need water to aid in reproduction
Fern VS Flower
FERN
swimming sperm
megaphylls
spores
FLOWER
seeds
fruit
rely on insects for pollination and animals to spread seeds
Xylem
Vascular tissue that transports water and mineral solutes upwards through the plant body
Phloem
Vascular tissue that transports sugars away from the plant body
Epidermal layer in woody VS non-woody stems
WOODY
epidermis is replaced by cork
protects plant
waterproof
NON WOODY
covered by a waxy cuticle that minimizes water loss and prevents disease
contains stomata and leaves
Monocot VS Eudicot
MONOCOT 1 cotyledon in seed root xylem and phloem in a ring vascular bundles scattered flower parts in 3s and multiples of 3s
EUDICOT 2 cotyledons in seeds root phloem between arms of xylem (Star) vascular bundles in a ring flower parts in 4s or 5s and multiples of
