Unit 1-Lesson 6 Flashcards
What kingdom is Algae apart of?
The Kingdom Protista
True and False. Brown Algae are not the largest and most complex protists
False, brown algae is the largest and most complex protists
List the characteristics of brown algae
- Largest size
- Most complex
- Nearly all marine (include 1500 species)
- Brown colour come from accessory
- Pigment fucxantbin
Technically seaweeds are…
not weeds, but algae, and eukaryotic
What is a Holdfasts?
Holdfasts: root like structure that anchors algae to rock or other hard surface
What is a Stipe?
Stipe: stem like structure extending from the holdfast in which leaf like blades grow off of
What is the most complex plant of brown algae?
Sea Kelp is the most complex of the brown algae
What are some features of Sea kelp?
- Features include:
- Holdfast that anchors to sea floor
- Broad leaf like blades
- Bulbs called pneumatocycsts (air bladders)
Is Red Algae multicellular or unicellular?
Red Algae is the first multicellular protists to evolve on earth around 1.2 billion years ago
How many species of red algae exist today?
6000 species
What kind of pigment does red algae release?
Unlike most other species, red algae release pigments called phycobilins. This gives off a reddish appearance
How does the pigment phycobilins help red algae?
this pigment allows these algae to grow to depths of a 100m or more
What kind of pigment does green algae have?
Have the same pigments as land plants (chlorophyll)
Where can you find most green algae?
Most green algae are aquatic species mostly found in fresh water with some species found in saltwater environments
- Can be found in a number of diverse environments: sea ice, trees, on other living organisms
How many species of green algae are there?
7,000 species
Describe the characteristics of Chlamydomonas (structurally diverse from green algae)
Chlamydomonas are unicellular and move using flagella (tail)
Describe the characteristics of Volvox (structurally diverse from green algae)
Volvox are unicellular and have flagella but occur in colonies
Describe the characteristics of Ulva (structurally diverse from green algae)
- multicellular
- can grow up to a meter in length despite only being two cells thick
- reproduction involves producing spore that use flagella to swim
Describe the characteristics of Spirogyra (structurally diverse from green algae)
Spirogyra are incredibly small multicellular algae
How are Green algae and plant similar?
Both have:
- Same colour and contain the same types of chlorophyll
- Cell wall composed of cellulose
- Food storage as starch
Why do scientists believe green algae is the more evolutionary close to land plants?
- The hypothesis that Green algae are the most evolutionary close in relation to land plant is based on many cellular similarities
- DNA sequencing supports this evolutionary relationship thus far
