Unit 1-Lesson 6

Question 1

What kingdom is Algae apart of?

Answer 1

The Kingdom Protista

Question 2

True and False. Brown Algae are not the largest and most complex protists

Answer 2

False, brown algae is the largest and most complex protists

Question 3

List the characteristics of brown algae

Answer 3

• Largest size
• Most complex
• Nearly all marine (include 1500 species)
• Brown colour come from accessory
• Pigment fucxantbin

Question 4

Technically seaweeds are…

Answer 4

not weeds, but algae, and eukaryotic

Question 5

What is a Holdfasts?

Answer 5

Holdfasts: root like structure that anchors algae to rock or other hard surface

Question 6

What is a Stipe?

Answer 6

Stipe: stem like structure extending from the holdfast in which leaf like blades grow off of

Question 7

What is the most complex plant of brown algae?

Answer 7

Sea Kelp is the most complex of the brown algae

Question 8

What are some features of Sea kelp?

Answer 8

• Features include:
  
  • Holdfast that anchors to sea floor
  • Broad leaf like blades
  • Bulbs called pneumatocycsts (air bladders)

Question 9

Is Red Algae multicellular or unicellular?

Answer 9

Red Algae is the first multicellular protists to evolve on earth around 1.2 billion years ago

Question 10

How many species of red algae exist today?

Answer 10

6000 species

Question 11

What kind of pigment does red algae release?

Answer 11

Unlike most other species, red algae release pigments called phycobilins. This gives off a reddish appearance

Question 12

How does the pigment phycobilins help red algae?

Answer 12

this pigment allows these algae to grow to depths of a 100m or more

Question 13

What kind of pigment does green algae have?

Answer 13

Have the same pigments as land plants (chlorophyll)

Question 14

Where can you find most green algae?

Answer 14

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

Question 15

How many species of green algae are there?

Answer 15

7,000 species

Question 16

Describe the characteristics of Chlamydomonas (structurally diverse from green algae)

Answer 16

Chlamydomonas are unicellular and move using flagella (tail)

Question 17

Describe the characteristics of Volvox (structurally diverse from green algae)

Answer 17

Volvox are unicellular and have flagella but occur in colonies

Question 18

Describe the characteristics of Ulva (structurally diverse from green algae)

Answer 18

• multicellular
• can grow up to a meter in length despite only being two cells thick
• reproduction involves producing spore that use flagella to swim

Question 19

Describe the characteristics of Spirogyra (structurally diverse from green algae)

Answer 19

Spirogyra are incredibly small multicellular algae

Question 20

How are Green algae and plant similar?

Answer 20

Both have:
- Same colour and contain the same types of chlorophyll
- Cell wall composed of cellulose
- Food storage as starch

Question 21

Why do scientists believe green algae is the more evolutionary close to land plants?

Answer 21

• 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