chapter 20-23 part 2---22

Question 1

Kingdom plantae

Answer 1

–Makes them different then animals -
–Phototropism (photosynthesis)
–multicellular - organized into tissues
–Eukaryote - has nucleus in the cells
–Same things as green algae

Question 2

Evolution

Answer 2

–First plant evolved from chlorophyta algae
–Formed hundred to million years ago
–Earliest land plants had spores that could be blown around the world by wind
–Earliest plants had no roots tecnonly
–Later plants had vascular tissue- like tubes
–Later they got Cuticle - thin layer of wax to protect and hold water in
–Pollen grains- had a sperm in it- to repudiation and to make more
–Later got a seed to protect the imbroll

Question 3

Spore plants

Answer 3

Have spores that gets blown around by wind

Has swimming sperms- need water to get to the egg

Question 4

-life cycle-

Answer 4

–all plants have alternation of generation - has 2 life cycles that are together
- 1 sporophyte - makes spores -
- they are diploid-2n complet cromzoins
- mitosis - cut the cromeszoines in hafe = haploid-1n set of cromeszoines
- 2spores get spread around - then grown into gametophyte

Question 5

Gametophyete - sex cell plants

Answer 5

–3. Need water for sperm to swim– ending up with the egg making a zygote which is a fertilized egg
–4 grown into a sporophyte