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Botany > Lecture 18 > Flashcards

Lecture 18 Flashcards

(42 cards)

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1
Q

what are the major characteristics of green plants

A

chlorophyll b, starch storage

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2
Q

what are the two main lineages of green plants

A

chlorophytes and streptophytes

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3
Q

•Chlorophyceae
•Trebouxiophyceae
•Ulvophyceae
make up which of the main lineages of green plants?

A

Chlorophytes

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4
Q

•Charophyceae
•Embryophytes
make up which of the main lineages of green plants?

A

Streptophytes

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5
Q

the four families of green algae

A
  • Chlorophyceae
  • Trebouxiophyceae
  • Ulvophyceae
  • Charophyceae
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6
Q

Chlorophyceae live in what type of environment?

A

mostly freshwater

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7
Q

do Chlorophyceae have flagella?

A

some have flagella and some dont

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8
Q

are Chlorophyceae unicellular or multicellular

A

unicellular

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9
Q

describe the structure of

Chlorophyceae

A

they are colonial and they have filamentous sheets

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10
Q

Trebouxiophyceae live in what type of environment?

A

Mostly Freshwater & Terrestrial

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11
Q

are Trebouxiophyceae multicellular or unicellular

A

unicellular

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12
Q

describe the structure of Trebouxiophyceae

A

they are colonial and they have filaments and blades

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13
Q

Ulvophyceae live in what type of environment?

A

Mostly Marine

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14
Q

what kind of life cycle do Ulvophyceae have?

A

Isomorphic sporiclife cycle or Haplontic

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15
Q

describe the structure of Ulvophyceae

A

Filamentous/Sheets of cells

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16
Q

Charophyceae live in what type of environment?

A

Mostly Freshwater

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17
Q

are Charophyceae multicellular or unicellular

18
Q

describe the structure of Charophyceae

Study These Flashcards
A

Unicellular, colonial, filaments, and Parenchymatous

19
Q

what is the closest living relative to land plants?

20
Q

what are the basal charophytes?

Study These Flashcards
A

Mesostigma
Chlorokybus
Klebsormidium

21
Q

zyganmetales

22
Q

desmids

Study These Flashcards
A

constricted two-part bodies

23
Q

how do coleohaete grow?

Study These Flashcards
A

branched growth

24
Q

how many species of chara are there?

25
what is the closest known living relative of land plants?
green algae (charophyceae)
26
what is the key difference in Charophyceae and Embryophytes
charophycae have a haplontic life cycle and embryophytes had a sporic life cycle
27
Transition from Haplontic to Sporic Life Cycle | Ancestral State
HaplonticLife cycle.Charophyceanalgae have zygotes (diploid) that undergo meiosis, producing haploid cells dispersed in water
28
Matrotrophy
retention of embryo on maternal tissue with maternal nourishment.
29
embryo
young multicellular sporophyte (diploid).
30
Novel Features of Land Plants
1. -Embryo 2. -Cuticle 3. -Sporopoleninwalled spores(decay resistant) 4. Antheridia & Archegonia with sterile jacket 5. -Sporiclife cycle 6. -(Stomata)
31
The First Land Plants appear
450 MYA.
32
Synapomorphy
A character that is shared by two or more species and that is a derivedtrait for the group.
33
Derived
resent in common ancestor of the group, but absent in earlier diverging relatives.
34
We use synapomorphies to construct _______. They define clades
synapomorphies
35
Pleisiomorphy
A character that is shared by two or more species but that is not unique to those species (or clade).
36
Ancestral
present in common ancestor of the group, and also present in earlier diverging relatives.
37
Land Plant Adaptations
- cuticle - stomata - archegonia - antheridia
38
cuticle
protects against desiccation, & is a UV screen
39
stomata
allows gas exchange and regulation.
40
archegonia and antheridia
specialized structures that produce and protect sex cells (prevents dehydration)
41
archegonia
produce eggs.
42
antheridia
produce sperm.

Botany (8 decks)

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