Introduction to Plants

Question 1

Plants

Answer 1

dominate most land on earth
known very little by humans

Question 2

Evolution of Plants

Answer 2

thought to have evolved from charophytes, a group of prostis green algea

Question 3

charactertistics of plants

Answer 3

• multicellular
• prokaryotic
• most preform photosytheis
• cell wall is made out of cellulose
• immobile (Sessile)
• reproduction of alternations of genertaions

Question 4

Alternation of generations

Answer 4

life cycle that alternates between diploid or haploid states/generations
diploid produces spores
haploid produces gametes

Question 5

asexual phase

Answer 5

sporohyte
diploid stage
form axseal spores
spres start growing into gametophyte

Question 6

sexual phase

Answer 6

gametophyte
gameetotyhype start to mature and producide haploid sex cells (gamtes)
go through fertilization to become diploid zygotes
they grow into sporohytye, an dthe cyle countinues

Question 7

bryophytes

Answer 7

• famlar group= mosses
• evoled many of thier features to make other terresial plant ssuccessful
  -does not include vasulcar system or seed
• use osmoisis, duffison and active transport to survive

Question 8

Rhizoids

Answer 8

not true roots
found in bryophytes
limted capicty for nutrients
lack of achorage

Question 9

Mosses: Pioneer plants

Answer 9

• the first to establish themselve son inhabitated areas
• ex. rocks and soil
• they enhance the eviomrnet when they die and descompose
• they provide organic matter that enhance soil and plant growth

Question 10

are all plants called mosses, mosses?

Answer 10

no
lichens are not mosses
spanish moss is not a moss
moss pinks are not mosees

Question 11

peat moss

Answer 11

• very useful moss
• pinoeer in ecosystem
• used in gardening
• feul is erupoe and asia
• can be chemically changed to make coal
• cna be an antiseptic
• clean up oil spills
• in WW1, it was used for surgial dressings, diapers and femine products

Question 12

Tracheophytes

Answer 12

Ferns
Have a vaslucr system
earliest vasular plant to evolve
reconiable feature is the leafy portion called frond
have no seed (spores)

Question 13

Ecological Succession

Answer 13

ferns and poinner plants help in ecological succession
can grow on bare, exposed rocks, open bogs, volcanic ash and after forest fire and marshes

Question 14

are all plants called ferns, ferns?

Answer 14

no
aspgraus fern is not a fern

Question 15

Fiddlehead Ferns

Answer 15

• young curled fronds of young ferns harvested as a vegetable
• have omgea 3, iron, fiber, ongea 6

Question 16

spermathypes

Answer 16

Known as seed plants
sudivsion of vasular plants (tracheophytes)
have roots, stem and leaves
variety of colours, odouers, shapes and sizes
recenlty evolved
- reprodction not dpeneted on water
- hav ea seed which has plabt embryo

Question 17

gymnosperms

Answer 17

pines, jupers, spures, redars and other plants with cones
thin needles like leaves which helps plant survive harsh dry, hot and cold climate
has deep pentrating roots
has hard waxy cuticle

Question 18

Yew

Answer 18

paclitaxel (chemotherapy drug) can be isolated from the tree bark and needles of yew tree

Question 19

Types of Spermatophytes: Angiosperms

Answer 19

• flowering plants
  -many kinds
• all are tracheophytes becaus ethye have vauslar tissue
• have flowers and fruit for repdouction
• example is rice

Question 20

Rice

Answer 20

seed of certian grass species
most grown for human consuption
many kinds

Question 21

Catgeiroes of plants

Answer 21

Brophyes
Tracheophyes
Sperophyes : germnophyes, aginospheres